#askGMBNTech before Henry leaves, could you please have him make a short video showing how to do his door jamb tubeless bead setting trick that he always mentions? I have thought about it and just cannot wrap my head around how it could possibly work.
#AskGMBNTech So I have a SRAM SX Derailleur horrible thing, ghost shifts, skipping all sorts. I will replace it with a Deore shortly my question can I run a M6100 with the SRAM cassette? Also would it be worth chasing SRAM for warranty to have one as a spare or maybe one that works? Bike is used for park and DH.
#AskGMBNTech Hey guys.... Great show! Love it! Can I ask though, is it possible that you lock the door so Henry can’t leave?? He’s gonna be missed! #TopPresenter
The head tube angle question really hit home to me why my Trek Mt. Track 850 feels like riding on top of a sideways door once I'm going downhill. I hate blaming my old hoopty when I'm having trouble with something, but this just explained why it feels like that. Now I'm twice as impatient for the bike I want to be in stock so I can order it. ARGH!
Loved cycling with Henry at Evesham Wheelers back in the day and then unexpectedly bumping into him at Fergburger in Queenstown NZ was quality. Really nice guy who loves cycling.
FYI I changed my Yari B1 110mm to C1 140mm, and as far as I can tell there is only one upper length available, the only difference is the scale printed on the leg and boost - the replacements are all scaleless.
I've just upgraded a 160 Lyrik to 170mm the scales are 150 and 160 but was told by a suspension specialist that the stanchions are the same for all models except the scale
I was raised on 70+ head angles. My Devinci has a flip chip but even in the steep position it still feels a little slack. It does feel better the faster I go though😂
Seat the tyre with CO2, without sealant in and with the valve core removed. Just wet the bead with soapy water. Remove the canister, put back the valve core as quickly as you can and pump up the tyre to the max recommended pressure. Leave it for 5+ minutes so the bead takes the rim shape and stays in place. Then remove the 'air', add the sealant and the valve core, and with a regular pump you should have no issues reinflating it back.
Re air can, some unscrew, some dont (held on by o ring). BUT a strap wrench is cheap and available in any motor factors (they are for removing car oil filters, but get the rubber strap one, not the chain version!)
3:00 - important to say that this only affects where your weight is (rearward/forward) in relation to the front axle, not in relation to anything else.
@@FirefighterBobby just an experiment so far, I listened to the interview in German by MTB-news. I got a bit crazy time consuming project going on, trying to translate it. 😃 so much good information. czcams.com/video/pBfmQfrughI/video.html I have only been able to translate about half of it so far., using my knowledge of German, dict.cc, hopefully it's useful. I wish they added captions.
@@FirefighterBobby So far I posted comment with all I was able to translate so far. I am not finished watching it, I got so caught up in watching it first I forgot to think about translating, so I began somewhere in the video.
I am sure all content creators in reference to bikes know this, but showing the head angle from horizontal is the correct way. Yes it is easier to unddrstand it showing vertical/fork angle, but then the angle would be somewhere around 20-30 degrees
#AskGMBNTech Thanks for a great show, almost everything I know about MTB comes from you. My question is, I'm 99,99% sure that I will buy the Stanton titanium Sherba, but would like to know your thoughts about Stanton and on titanium mtb frames?
#AskGMBNTech Hi guys, love the show. Really sad to hear Henry leaving, all the best for the future endavours. My question is: I have a Commencal Clash, it’s 27.5 bike with 180mm travel in front and 165mm in the back. What I’d like to do is to convert it into a Mullet set up by putting 29” wheel in front with new fork with 160mm travel. Is that route a good way of keeping the geo of the bike without changes and adding the benefit of bigger wheel up front? Or maybe go with 170mm in front as Clash has a really low bottom bracket and suffers from pedal strikes. What do you think of doing a mullet this way, will it work? Many thanks.
10:34 9point8 has released an angle headset for bikes with integrated headset, it's a 3 piece design, the bups thread into the middle part. Hardtail Party installed it on one of his friend's bikes it was a Santa Cruz, but the carbon frame was not made for is of course so it required some sanding to get the cup in,cus of tiny i perfection in the hole.
#AskGMBNTech. Hi Doddy and Henry. Love the show. Sorry to hear you’re leaving Henry. I’ve really enjoyed your perspective on mountain bike tech. I ride a Cube Stereo 140 and I’ve converted it from a 26-36 2x11 to to a 32 1X11. Not a really big job but I’m trying learn how to do more of my own bike maintenance. My question is: I now have an XT shifter at the bottom of my tool box. Seems like a real waste. Can it be converted into a dropper post lever (or something even better) the factory dropper lever is okay but ergonomically not as good as most others? Thanks from Saskatchewan
While anything is possible with enough time and money. Most likely not, the dropper lever is a momentary pull on the cable and releases to lock the dropper in place after you let go, the shiftier is meant to lock in place afterwards. Also the length of cable pull I'm pretty sure is different.
steven7650 Thanks. It seems like such a waste and the idea of having a free dropper lever that would mount to my brake levers sounded like a good idea. Probably not worth the hassle to even try. Better of spending the money on a Bike Yoke or Wolftooth.
I'd say, since both come at the cost of more weight: Brakes: True. As long as you have enough modulation, that's good. Suspension... Depends on the bike. I don't want more than 100-140 on the talas fork DC Hardtail. On a full DH Race bike, go to town...
#ASKGMBNTECH Why do DH bikes usually have their seats at the height they do? We slam our seats in bmx, dirt jumping, and trials for more room and maneuverability. Since you don't exactly sit in the seat of a DH bike why not slam it way out of the way?
#askgmbntech Hey, Doddy, hey Henry! I've got an xc hardtail that came with 700 mil bars and 80 mil stem, but I feel they're a bit too narrow for me(I'm 6'4 and I've got pretty wide shoulders) and I wanna get an 800 mil bar. Is it a good idea, and would I have to change my stem to a shorter one? Also, I've got a weird fork that's 80 mil travel, but it's the same length as a 100 mil one(and it's pretty much trash). So would it be a good idea to swap it for a 120 mil, or would I be better off with 100 mil one? Love the show, have a nice day!
Eugene Filatov what bike do you ride? Usually I’d opt for the shortest stem available, because you gain so much more stability and fun! But since your not the shortest guy, you have to consider if your top tube and reach is long enough, so you still sit comfortably on your bike. For the bars I would say go for 800mm if your shoulders are wide enough and again you feel comfortable with a bar that wide on a Cross Country bike. Fork wise I would say definitely go for at least 100mm. Overforking 40mm isn’t something I’d usually recommend, because of the changes in geometry and the added stress on the headtube welds. But you said your 80mm fork has the exact same length like a 100mm fork, so going for 120mm should be the same like regularly overforking 20mm. Something I would not mind at all, because the geometry stays fairly the same and it doesn’t put to much stress on your frame if you add 20mm in the front. It seems like you’re more interested in descending, than ascending nowadays. So maybe you’d like to think about selling your XC hardtail and get yourself a nice Trail/Enduro Hardtail. If your into it and the higher price isn’t that much of an issue, you could even look at a full suspension bike!
@@rolux4853 thanks! Your advice is really helpful! Now about my bike.... Here in Ukraine, it's really hard to find mtbs in 800-2000$ range(mostly because of covid), and so I bought a cheap 300$ xc and plan to upgrade it a bit( plus if I brake it I won't be so sad). The frame is good, I swapped the saddle, grips and pedals, put on a hydraulic brake on the front, plan to swap the fork, bars and stem. Thanks again, Good luck!
#AskGMBNTech Hello great show 2 questions: when getting a new chain there is grease on it, should I still lube it? Also I have a 2x crankset on a single speed, if I were to put 2 single speed cogs on the rear and 2 narrow wides on the front and 2 chains what would happen, would it have the effect of an oval chainring?
#AskGMBNTech I don't quite get the reverse thred. I understand it is so it doesn't unscrew it's self but it seems to go in the wrong direction to do so. For example a bottem bracket on the drive side of the bike threads in anti clockwise but when you pedal your cranks go clockwise. Thanks, love the show.
Makes a lot of sense very quickly if you hold a pen/pencil loosely in your fists held side by side: when you rotate (pedal) your right fist clockwise, the pen (spindle) wants to rotate counterclockwise. That’s what the threading is based on - precession. en.m.wikipedia.org/wiki/Precession_(mechanical) Take a look at the animation: that’s your bottom bracket from the non-drive side when you’re pedaling forward. Red circle is the bottom bracket, blue circle your spindle. The blue box shows you the direction your spindle wants to rotate in when you pedal. It takes a minute to wrap your head around. :)
#AskGMBNTech After much frustration with presta valve cores, I’m thinking of converting them to schrader with ConvertAir? Schrader valves hold hundreds of psi in our shocks not to mention are used in road/race vehicles, scuba gear, and aircraft. Presta valves make sense in narrow road rims but seem fragile and fiddly on 30i+ MTB rims? The weight penalty seems minor compared to the heavy casings and tire inserts we put on our bikes. Are there any compelling reasons not to make the switch? Also, Henry will be missed and I wish him good luck.
#AskGMBNTech It seems that over the last few years, with all the new Geo, that the lines have been blurred on MTB categories. Does All Mtn even still exist, and what are the perimeters for defining MTB categories?
#AskGMBNTech First of all I love the show and I'm so thankful for all this great Mtb content. Lately I did a full service on my 2016 Rockshox Yari. According to the service manual I changed the oil in the open bath damper. After the service the damper only engaged after 10 mm into the forks travel in it's fully closed setting. RS states an oil volume of 160 cc and I did the service according to the manual. Since the problem didn't existed before the service i ask myself if the previous owner put more than 160 cc of oil into the damper to get rid of the problem and if so could this create further problems down the line? Greetings from Germany
Because people like to believe in stupid hypes, flat planets, invisible man in the sky, Elisabeth's age and sram having 1by before Shimano. Apparently it's because it's sliding better and adds longetivity and optimal performance the way they do it. We should pay more and not ask questions.
#AskGMBNTech Hey guys - while looking to buy a trail bike, I've come across many reviews describing some bikes as "comfortable on longer rides" while others are said to be the opposite. What is "comfort-oriented" geometry? I keep reading how bike X is "tailor-made for long days in the saddle" while bike Y is "more aggressive and less comfortable on long rides". What makes a mile-muncher, long ride and comfortable bike, and what makes a bike less comfortable and less suitable for long days in the saddle?
Hey GMBN, nice video as always! But I want to correct one thing.You're wrong about increasing travel on the revelation fork. 1. No need for new uppers. They are the same length regardless of travel but have different printing on them. 2. The dimple is not in a different location, that's just an internet myth. It sits in relation to the piston and seal head, which are always in the same location. What changes with travel is the airshaft length and nothing else. 3. Bottom out is still handled by rubber bumpers in the lowers. The uppers are the same length regardless, because bottom out has to work. No difference regardless of travel. 4. Bottom line, YES he can without any issue use the same uppers. Get your facts straight man! ;-)
Hi Doddy and Henry, I recently purchased a new fram (Commencal Meta AM 29) and I want to fit a RockShox Coil shock. However, there is no such option yet and they use a very unusual shock (230*62,5 mm). My question is, if it is possible to buy a 230*65mm shock and change the travel of its strock? If yes, how can I do this? #AskGMBNTech
Sram uses a special grease on its shocks o rings (comes in the service kit), u cant use sram butter ..so butter MIGHT not be suitable on other shocks too.... Shocks do get hot on long descents, especially if a hot country like parts of mexico
#AskGMBNTech Hi GMBN! I have a 2010 Specialized Demo 8 I, which has the Fox DHX 4.0 rear shock. Recently I took the spring off to cycle the shock by itself and clean it. When I got the spring back on the bike the shock would not compress. After pushing on it and trying to get it to compress, it did. But there was no longer damping to the shock. I would assume something internally broke. Is there any way to get it fixed? Or should I just buy a new rear shock? Thanks!
#AskGMBNTech Hi guys, love the show a lot! I heard that riding a bike on a pumptrack or jumping it with the Rear Shock locked out is harmful for the shock, but how about doing the same things with "Pedal mode" activated? Thanks a lot for your answer!
#AskGMBNTech I have a 2015 Cannondale Trigger Carbon 2 with 27.5 wheels and a 2x drivetrain. My rear cassette is worn out. I'm tempted to upgrade to a 1x instead of just replacing the cassette, but am not sure it is worth putting that much money into a almost 6 year old bike that I've basically ridden into the ground (for instance I broke the rear triangle last year). How do you decide when to upgrade a component on an older, beloved, bike, versus go shopping?
#AskGMBNTech Hi guys! I ride a Chisel with 90mm stem and 750mm bar, which is absolutely great for climbing, as well as terrible for descending. I’d like to change those for a wider 780mm bar and a shorter stem... will a 60mm stem make any difference? Will a 45mm stem mess to much with the geometry? I Can’t decide. Thanks guys.
#AskGMBNTech How disadvantaged will I be picking a bike with a fork that doesn’t have HSC & HSR? I’m aiming to race local events. Eg. Lyrik Select+ vs Lyrik Ultimate
#AskGMBNTech Hi there! I have two bikes, one hardtail (Decathlon 540) and one full suspension (Decathlon 540s), i know they are not the best bikes but they do the job right now. On the full susp i have 19c rims and on the hardtail i have 23c rims. My question is, how big i can go on the tires? On the full susp i have 2.2 Trail King with 55-584 on the back and on massive Mountaing King 2.4 60-584 on the front. I like the grip but sometimes i feel like the front has a mind of it's own :). Should i go 2.3 or get the rims from my hardtail? Thank you!
#AskGMBNTech I have a non tapered (trail HT) frame and i will buy a tapered fork and install it with adaptor for tapered fork, my question is does the non tapered frame with tapered fork and adaptor has the same stiffness with the tapered frame and tapered fork?
#AskGMBNTech Hi I'm really enjoying the content you put together each week. Could you recommend a good light for riding my local woodland trails now the sun is setting earlier. Would only running a bar mounted light be ok or would I need a helmet one as well?
#AskGMBNTech Hey guys! Love the show! So I'm planning to buy a Magura MT Sport brake on the front and I'm wondering what (180) rotors should I buy that is compatibe with the semi-metalic pads on the brakes?
#askgmbntech I know this isn’t your usual question, since it’s about a very specific type of bike, which you normally not cover. But could you explain to me why the newest generation of wheelie bikes (like the Collective C100 for example) opts for a geometry that was the norm for Cross Country Mountainbikes at around 2008? Almost 70 deg headtube angle, 71 deg seattube angle, pretty high standover, the same toptube length as the bikes back then etc. Why is this geometry considered especially good for wheelies? I was very surprised when I found out about these bikes geometry. Usually the wheelie bikes were scaled up BMX cruisers, which were pretty decent in terms of riding on your back wheel, so why the drastic change? Also would I be able to build myself a nice and cheap wheelie bike with the XC parts from back then or is constantly riding on the back wheel to much stress for these lightweight parts? P.s.: I love your show, you’ve all came such a long way and made something really special out of it! Thank you for your amazing videos and all the great advices. It’s so sad to see Henry leave, since he grew on me so much from the first time I saw him. I wish him all the luck on the world on his future paths, and hopefully we’re able to see him in front of the camera again one day.
#AskGMBNTech - I just bought a 2021 Fuel EX8 XT and took it on a few rides on my local trails. In getting the bike dialed in, which would help with too much bounce off small rock and root chatter? Rebound or Tire psi changes or both? So far I have set the bike to Trek's factory settings but added a few clicks of rebound since , and dropped from 30 to 25psi front and rear and that helped a bit but its still not really there. anything you can recommend would be appreciated. I don't plan to do many jumps , its mostly just trying to smooth out the rock gardens and trail chatter. Thanks!
Yes, half a degree probably doesn't but 71 vs 68 vs 65 is noticeable even by a newbie. Though it probably makes less of a difference than when I forget to adjust my rebound damping and pogo off a rock, lol.
#AskGMBNTech Hi, I am a tri and gravel rider from Hong-Kong, and ready jump on MTB right now. I got a Lapierre Spicy 527 (2017) old stock from dealer, it has a 170mm travel fork and 230x57.5mm shock with 165mm travel, I want to change a coil shock for better traction (that’s cool). Unfortunately, 230x57.5mm size is rare on market. But I saw a lot of same E2E shock with little bit longer stroke, any problem if I mounted a 230x60mm? I guess it will not change bike geometry. Love your show, a GCN and GMBN fans from HK.
Hi GMBN. I am looking at getting a new bike in the foreseeable future. I was looking at a 2019 slash 8 2nd hand but the 2021 slash 8 has a degree slacker head angle. How much of a difference does this make and can an angle set be fitted to a knock block headset? Thanks
Love the bike design czcams.com/users/postUgkxHL1v1R3NE5x4KiYfyt8dnQmyNYz7qi5L and functionality. It is hard to align the front tired to center the disk brakes. The brake wheel touches the stationery side of the brake caliper and pad. I aired the tire up to 40 psi as the markings say 40-60psi. Left the house for a few hours and came back to an exploded innertube.All in all it seems to be a good bike. Have not ridden it yet though so that's the max of my knowledge. Update, put a new innertube made sure the tire was set properly and it did the same thing in under 20 minutes as second pic shows.
#AskGMBNTech Great show! I been meaning to ask: I reinstalled Shimano calipers on my bike after buying new pads as I started using the not so old Jamis Durango SX, the issue is: the back brake caliper doesn´t align properly with the disc or wheel (I've already tried trueing the wheel, checked for a bent rotor, also tried with different wheels), so the rotor and the pads rub to the point where the wheel it's not moving at all unless you apply force. I've tried many of the troubleshooting on your videos to no results, any ideas?
#askgmbntech I just took my new bike out for its first proper dirt ride. I noticed my brake rotors would rub for a bit after hard braking (say, before a corner), and then be fine when I would stop and spin the wheels to check. Is this anything to worry about, and if so, what things should I check? My brakes are shimano deore 2 pot hydraulic. I did swap the hoses from UK style to US style setup, and it doesnt feel like I left any air in there. Doubt it's relevant, but this is on a voodoo mambo HT, 180mm front and 160mm rear rotors.
The only problem I have with the Mighty Grim Donut is the color - it should be pink! If you have a problem with this, bookmark this and come back in 15 years to tell me how wrong I was.
For someone who wears or 400 lb what's a good mountain bike I was thinking about getting a full suspension aluminum or steel frame weight doesn't matter on the frame size so wanting to ask you it's a false inspection by good for a person who weighs over 400 lb if not what if he gets a heart tail for me
I am not sure the suspension matters in terms of the frame not breaking. I broke my fully. At the rear. But definitely go steel. Think oceangate. Steel can take what it can take over and over. My Alu one broke doing nothing just a curb. Fatigued
#AskGMBNTech I have a 2019 Specialized Stumpjumper ST Carbon Comp. It has a head tube angle of 67.5 degrees. What information do I need to know to find out what angled headset would be compatible for my bike? Can you suggest a sound option? I would like to slacken the head tube angle to 67 or even 66.5 degrees. Do you think this is a good upgrade as most short travel trail bikes are now running angles in the 66 degree range?
#askgmbntech hy guys, what do you thought about 120mm rear (less sag) and 150/160mm front (more sag more volume spacers), if riding characteristic is not a problem, then what possibly happend to the frame? Is that safe for aggressive ride? Have a great day! Thanks!
#AskGMBNTech what bikes are manufactured in the UK? I've been looking at full sus trail/enduro bike. 150 or 160mm travel and there doesn't seem to be a lot to choose from when looking for a UK manufactured bike.
#askGMBNTech Hi guys! Slightly different question for you this week... I recently broke my collarbone out on a ride. How long would you expect it to take until I can get back out on my bike?
#AskGMBNTech I've come to do a deep clean of my drive train but my SRAM GX Eagle cassette seems to be stuck on my XD freehub. I think I've threaded either the freehub or the cassette. Any tips on removing it? I've removed and mounted it before now, when mounting it I've given it a good amount of lube and torqued to the specifcation given by SRAM but this is ridiculous, should I keep to these specs or just go by feel next time?
#AskGMBNTech Gents, contemplating upgrading my worn 11 GX drive train. Many of my friends are riding 12 speed all summer and often complain that they are forever indexing gears because it's so finicky. I've not ridden 12x and my legs can push the 11x. Stick with the old faithful? What's your opinion?
#AskGMBNTech Hey GMBN Tech Team, what do you think about this? I have a Voodoo full sus bike. I have upgraded wheels, tyres, brakes, drivetrain. It has decent Rockshox Sektor forks. The rear shock is Suntour Epixon. It seems to be a less common size. I could get a RockShox Ultimate Deluxe Debonair for £350. Do you think the better performance would be worth it?
#askgmbntech For the past few years Shimano promoted the benefits of direct mount rear mechs, and seem to still be doing on road groupsets. The 12 speed mtb rear mechs look to use a standard mount, have Shimano given up on the direct mount standard?
#AskGMBNTech. Hello what is the best brand of trail full face helmet and one that doesn't have a price out of this world 😁............. I love every single one of your videos...... Thank You!!!!!
#AskGMBNTech I have a nukeproof scout that I ride on very steep and rough downhill (it's super fun and is actually improving my line choice) it currently has the 140mm fox 36 rhythm that it came with, I would like to upgrade to a 150mm fork and have been looking at the mrp ribbon coil. My thinking is that the coil fork will give much needed extra grip on the rough stuff(is this correct?) but I'm not too sure what it would do to the geometry with the added 10mm of travel and different axle to crown length
Do you have a mountain bike tech question? Use the hashtag #AskGMBNTech with your comment for a chance to be featured on the show 👇
#askgmbntech is a cannon dale trigger 4 good since I am 14
Yall talk about head angle watch the grim donut
What determines the top speed of a bike in terms of the gears? #AskGMBNTech
#askGMBNTech before Henry leaves, could you please have him make a short video showing how to do his door jamb tubeless bead setting trick that he always mentions? I have thought about it and just cannot wrap my head around how it could possibly work.
#AskGMBNTech So I have a SRAM SX Derailleur horrible thing, ghost shifts, skipping all sorts. I will replace it with a Deore shortly my question can I run a M6100 with the SRAM cassette? Also would it be worth chasing SRAM for warranty to have one as a spare or maybe one that works? Bike is used for park and DH.
Going to miss Henry - he has such a lovely patient way of explaining things
Why? Is he leaving?
What? Why?
why
He is going travelling
Good luck Henry, you were a great addition to the show and will be missed.
57 degree
head angle clearly the fastest for downhill.
ah the grim donut
Only big brain people can understand
Nah.. Still depends on the rider also its only fast on steep trails but on big jumps ooopps crack then boom shhhrkkk creek crack snap
Grim Donut!
well if your as good as yoan barreli
It was excellent to have the insight of a real mtb mechanic! Your tips will definitely be useful for many! Good luck on your adventures Henry!!
Wish Henry wasn't leaving he is really knowledgeable and has good ways of explaining complex specs on parts or bike related things.
#AskGMBNTech
Hey guys.... Great show! Love it!
Can I ask though, is it possible that you lock the door so Henry can’t leave??
He’s gonna be missed! #TopPresenter
TOTALLY. Big loss.
But his life, so unlawful imprisonment prob not good HR practice😂😋
Henry- Great explanation of headtube angle without going into a chapter of Milliken's Racecar Vehicle Dynamics :P
Love your long explanations Henry, really going to miss you on the show!
The head tube angle question really hit home to me why my Trek Mt. Track 850 feels like riding on top of a sideways door once I'm going downhill. I hate blaming my old hoopty when I'm having trouble with something, but this just explained why it feels like that. Now I'm twice as impatient for the bike I want to be in stock so I can order it. ARGH!
Loved cycling with Henry at Evesham Wheelers back in the day and then unexpectedly bumping into him at Fergburger in Queenstown NZ was quality.
Really nice guy who loves cycling.
Thanks Henry👍😎 good info as always
FYI
I changed my Yari B1 110mm to C1 140mm, and as far as I can tell there is only one upper length available, the only difference is the scale printed on the leg and boost - the replacements are all scaleless.
I've just upgraded a 160 Lyrik to 170mm the scales are 150 and 160 but was told by a suspension specialist that the stanchions are the same for all models except the scale
@@crit71
The lyric and Yari Stanchions are the same part too (the lower legs and damper are the only difference).
Absolute fountain of knowledge and clarity as ever.
Thanks For the very very helpful tips and answers
Stoked you liked she show Jacob! We post #AskGMBNTech every Monday 👍
Particularly good bunch of tips this week folks!!
Yeah, always watch them!
I was raised on 70+ head angles. My Devinci has a flip chip but even in the steep position it still feels a little slack. It does feel better the faster I go though😂
The only thing I don't like is that the bars turn way too easy, so I can't lean my bike on walls like I'm used to.
Seat the tyre with CO2, without sealant in and with the valve core removed. Just wet the bead with soapy water. Remove the canister, put back the valve core as quickly as you can and pump up the tyre to the max recommended pressure. Leave it for 5+ minutes so the bead takes the rim shape and stays in place. Then remove the 'air', add the sealant and the valve core, and with a regular pump you should have no issues reinflating it back.
Makes corners damn tough
This.. 👍
Re air can, some unscrew, some dont (held on by o ring).
BUT a strap wrench is cheap and available in any motor factors (they are for removing car oil filters, but get the rubber strap one, not the chain version!)
3:00 - important to say that this only affects where your weight is (rearward/forward) in relation to the front axle, not in relation to anything else.
This is timely. Just got some 4 piston brakes and a 180mm rotor for the front to replace my avid bb5.
About "Head Tube Angle" - take a look at Finland's Pole and Pink Bike's Grim Donut. LOL 🤪
Gmbn rides Pole,Nukeproof, Canyon.
Alutech picked it up right away.
Made a copy of their own right after Mike made it.
@@FirefighterBobby just an experiment so far, I listened to the interview in German by MTB-news. I got a bit crazy time consuming project going on, trying to translate it. 😃 so much good information.
czcams.com/video/pBfmQfrughI/video.html
I have only been able to translate about half of it so far., using my knowledge of German, dict.cc, hopefully it's useful. I wish they added captions.
@@mtbboy1993 I speak it pretty good. So it won't be a problem. Should I help?
@@FirefighterBobby So far I posted comment with all I was able to translate so far. I am not finished watching it, I got so caught up in watching it first I forgot to think about translating, so I began somewhere in the video.
I am sure all content creators in reference to bikes know this, but showing the head angle from horizontal is the correct way. Yes it is easier to unddrstand it showing vertical/fork angle, but then the angle would be somewhere around 20-30 degrees
#AskGMBNTech
Thanks for a great show, almost everything I know about MTB comes from you. My question is, I'm 99,99% sure that I will buy the Stanton titanium Sherba, but would like to know your thoughts about Stanton and on titanium mtb frames?
#AskGMBNTech
Hi guys, love the show. Really sad to hear Henry leaving, all the best for the future endavours.
My question is: I have a Commencal Clash, it’s 27.5 bike with 180mm travel in front and 165mm in the back. What I’d like to do is to convert it into a Mullet set up by putting 29” wheel in front with new fork with 160mm travel. Is that route a good way of keeping the geo of the bike without changes and adding the benefit of bigger wheel up front? Or maybe go with 170mm in front as Clash has a really low bottom bracket and suffers from pedal strikes. What do you think of doing a mullet this way, will it work? Many thanks.
10:34 9point8 has released an angle headset for bikes with integrated headset, it's a 3 piece design, the bups thread into the middle part. Hardtail Party installed it on one of his friend's bikes it was a Santa Cruz, but the carbon frame was not made for is of course so it required some sanding to get the cup in,cus of tiny i perfection in the hole.
“Spawn of the devil.” Tell us how it is Henry.
#AskGMBNTech. Hi Doddy and Henry. Love the show. Sorry to hear you’re leaving Henry. I’ve really enjoyed your perspective on mountain bike tech. I ride a Cube Stereo 140 and I’ve converted it from a 26-36 2x11 to to a 32 1X11. Not a really big job but I’m trying learn how to do more of my own bike maintenance. My question is: I now have an XT shifter at the bottom of my tool box. Seems like a real waste. Can it be converted into a dropper post lever (or something even better) the factory dropper lever is okay but ergonomically not as good as most others? Thanks from Saskatchewan
While anything is possible with enough time and money. Most likely not, the dropper lever is a momentary pull on the cable and releases to lock the dropper in place after you let go, the shiftier is meant to lock in place afterwards. Also the length of cable pull I'm pretty sure is different.
steven7650 Thanks. It seems like such a waste and the idea of having a free dropper lever that would mount to my brake levers sounded like a good idea. Probably not worth the hassle to even try. Better of spending the money on a Bike Yoke or Wolftooth.
The grim donut is a speedy boi for straight courses but for my xc bois we need the steep angles for the tight corners
for the SLX brake issue , wear louder earphones.
that should remove the sound and fix it
:P
You can't never have too much of 2 things,... Brakes and suspension!
I'd say, since both come at the cost of more weight: Brakes: True. As long as you have enough modulation, that's good. Suspension... Depends on the bike. I don't want more than 100-140 on the talas fork DC Hardtail. On a full DH Race bike, go to town...
Gmbn tech 4 life
Great questions and great answers. 👍
#ASKGMBNTECH Why do DH bikes usually have their seats at the height they do? We slam our seats in bmx, dirt jumping, and trials for more room and maneuverability. Since you don't exactly sit in the seat of a DH bike why not slam it way out of the way?
#askgmbntech
Hey, Doddy, hey Henry! I've got an xc hardtail that came with 700 mil bars and 80 mil stem, but I feel they're a bit too narrow for me(I'm 6'4 and I've got pretty wide shoulders) and I wanna get an 800 mil bar. Is it a good idea, and would I have to change my stem to a shorter one? Also, I've got a weird fork that's 80 mil travel, but it's the same length as a 100 mil one(and it's pretty much trash). So would it be a good idea to swap it for a 120 mil, or would I be better off with 100 mil one?
Love the show, have a nice day!
Eugene Filatov what bike do you ride?
Usually I’d opt for the shortest stem available, because you gain so much more stability and fun!
But since your not the shortest guy, you have to consider if your top tube and reach is long enough, so you still sit comfortably on your bike.
For the bars I would say go for 800mm if your shoulders are wide enough and again you feel comfortable with a bar that wide on a Cross Country bike.
Fork wise I would say definitely go for at least 100mm.
Overforking 40mm isn’t something I’d usually recommend, because of the changes in geometry and the added stress on the headtube welds.
But you said your 80mm fork has the exact same length like a 100mm fork, so going for 120mm should be the same like regularly overforking 20mm.
Something I would not mind at all, because the geometry stays fairly the same and it doesn’t put to much stress on your frame if you add 20mm in the front.
It seems like you’re more interested in descending, than ascending nowadays.
So maybe you’d like to think about selling your XC hardtail and get yourself a nice Trail/Enduro Hardtail.
If your into it and the higher price isn’t that much of an issue, you could even look at a full suspension bike!
@@rolux4853 thanks!
Your advice is really helpful!
Now about my bike.... Here in Ukraine, it's really hard to find mtbs in 800-2000$ range(mostly because of covid), and so I bought a cheap 300$ xc and plan to upgrade it a bit( plus if I brake it I won't be so sad). The frame is good, I swapped the saddle, grips and pedals, put on a hydraulic brake on the front, plan to swap the fork, bars and stem.
Thanks again,
Good luck!
Hardcore Henry 👑💪
The hashtag is wrong in the title
🤦♂️ Cheers Toby 🤘👊
#AskGMBNTech
Hello great show
2 questions: when getting a new chain there is grease on it, should I still lube it? Also I have a 2x crankset on a single speed, if I were to put 2 single speed cogs on the rear and 2 narrow wides on the front and 2 chains what would happen, would it have the effect of an oval chainring?
#AskGMBNTech I don't quite get the reverse thred. I understand it is so it doesn't unscrew it's self but it seems to go in the wrong direction to do so. For example a bottem bracket on the drive side of the bike threads in anti clockwise but when you pedal your cranks go clockwise. Thanks, love the show.
Makes a lot of sense very quickly if you hold a pen/pencil loosely in your fists held side by side: when you rotate (pedal) your right fist clockwise, the pen (spindle) wants to rotate counterclockwise. That’s what the threading is based on - precession.
en.m.wikipedia.org/wiki/Precession_(mechanical) Take a look at the animation: that’s your bottom bracket from the non-drive side when you’re pedaling forward. Red circle is the bottom bracket, blue circle your spindle. The blue box shows you the direction your spindle wants to rotate in when you pedal. It takes a minute to wrap your head around. :)
Awesome show Henry!
Will be such a shame to see you leave GMBN!
Would be great if you ended up back on youtube somewhere.... :)
#AskGMBNTech After much frustration with presta valve cores, I’m thinking of converting them to schrader with ConvertAir? Schrader valves hold hundreds of psi in our shocks not to mention are used in road/race vehicles, scuba gear, and aircraft. Presta valves make sense in narrow road rims but seem fragile and fiddly on 30i+ MTB rims? The weight penalty seems minor compared to the heavy casings and tire inserts we put on our bikes. Are there any compelling reasons not to make the switch? Also, Henry will be missed and I wish him good luck.
#AskGMBNTech
It seems that over the last few years, with all the new Geo, that the lines have been blurred on MTB categories. Does All Mtn even still exist, and what are the perimeters for defining MTB categories?
#AskGMBNTech
First of all I love the show and I'm so thankful for all this great Mtb content.
Lately I did a full service on my 2016 Rockshox Yari. According to the service manual I changed the oil in the open bath damper. After the service the damper only engaged after 10 mm into the forks travel in it's fully closed setting. RS states an oil volume of 160 cc and I did the service according to the manual. Since the problem didn't existed before the service i ask myself if the previous owner put more than 160 cc of oil into the damper to get rid of the problem and if so could this create further problems down the line?
Greetings from Germany
Great show... 😎 interesting content...
#askGMGNtech why does putting the chain in the big chainring in the front make you pedal harder, put putting it in the rear makes you pedal easier?
02:24 thank me later
Nobody wrote a simple "thank you" later and this man didn't demand a soul or going to war for him. Thank you, for everyone of us.
There are timestamps...
why is Kashima on fox suspension a different colour for front and rear, the front seams lighter and rear darker? #askgmbntech
Because people like to believe in stupid hypes, flat planets, invisible man in the sky, Elisabeth's age and sram having 1by before Shimano.
Apparently it's because it's sliding better and adds longetivity and optimal performance the way they do it. We should pay more and not ask questions.
Lost something at 1:16 ? ;D
the water bottle?
Ivo Roilev 👏🏻
#AskGMBNTech Hey guys - while looking to buy a trail bike, I've come across many reviews describing some bikes as "comfortable on longer rides" while others are said to be the opposite. What is "comfort-oriented" geometry? I keep reading how bike X is "tailor-made for long days in the saddle" while bike Y is "more aggressive and less comfortable on long rides". What makes a mile-muncher, long ride and comfortable bike, and what makes a bike less comfortable and less suitable for long days in the saddle?
Hey GMBN, nice video as always! But I want to correct one thing.You're wrong about increasing travel on the revelation fork.
1. No need for new uppers. They are the same length regardless of travel but have different printing on them.
2. The dimple is not in a different location, that's just an internet myth. It sits in relation to the piston and seal head, which are always in the same location. What changes with travel is the airshaft length and nothing else.
3. Bottom out is still handled by rubber bumpers in the lowers. The uppers are the same length regardless, because bottom out has to work. No difference regardless of travel.
4. Bottom line, YES he can without any issue use the same uppers.
Get your facts straight man! ;-)
Man, thank you for posting this!
Hi Doddy and Henry, I recently purchased a new fram (Commencal Meta AM 29) and I want to fit a RockShox Coil shock. However, there is no such option yet and they use a very unusual shock (230*62,5 mm). My question is, if it is possible to buy a 230*65mm shock and change the travel of its strock? If yes, how can I do this? #AskGMBNTech
Have a look at off set bushes. You might be able to knock the 2.5mm off.
Sram uses a special grease on its shocks o rings (comes in the service kit), u cant use sram butter ..so butter MIGHT not be suitable on other shocks too....
Shocks do get hot on long descents, especially if a hot country like parts of mexico
Oh no, it's the ghost of Henry
#AskGMBNTech
Hi GMBN! I have a 2010 Specialized Demo 8 I, which has the Fox DHX 4.0 rear shock. Recently I took the spring off to cycle the shock by itself and clean it. When I got the spring back on the bike the shock would not compress. After pushing on it and trying to get it to compress, it did. But there was no longer damping to the shock. I would assume something internally broke. Is there any way to get it fixed? Or should I just buy a new rear shock? Thanks!
#AskGMBNTech
Hi guys, love the show a lot!
I heard that riding a bike on a pumptrack or jumping it with the Rear Shock locked out is harmful for the shock, but how about doing the same things with "Pedal mode" activated?
Thanks a lot for your answer!
#AskGMBNTech I have a 2015 Cannondale Trigger Carbon 2 with 27.5 wheels and a 2x drivetrain. My rear cassette is worn out. I'm tempted to upgrade to a 1x instead of just replacing the cassette, but am not sure it is worth putting that much money into a almost 6 year old bike that I've basically ridden into the ground (for instance I broke the rear triangle last year). How do you decide when to upgrade a component on an older, beloved, bike, versus go shopping?
#AskGMBNTech Hi guys! I ride a Chisel with 90mm stem and 750mm bar, which is absolutely great for climbing, as well as terrible for descending. I’d like to change those for a wider 780mm bar and a shorter stem... will a 60mm stem make any difference? Will a 45mm stem mess to much with the geometry? I Can’t decide. Thanks guys.
GMBN Tech : Is there any downside of changing a 1x front chaining from a 30t to 34 or 36t
#askgmbntech my wheels is (almost ) completely true but there is still a lot of wobble coming from the tire. How can I fix this?
Raphael Roshwalb I had this problem when I put a new tire on. I aired it to the max psi then down to what I wanted and it was fine
@@Btothewill thanks
#AskGMBNTech
How disadvantaged will I be picking a bike with a fork that doesn’t have HSC & HSR? I’m aiming to race local events. Eg. Lyrik Select+ vs Lyrik Ultimate
Could be Henry’s last #askgmbntech
#AskGMBNTech
Hi there!
I have two bikes, one hardtail (Decathlon 540) and one full suspension (Decathlon 540s), i know they are not the best bikes but they do the job right now. On the full susp i have 19c rims and on the hardtail i have 23c rims. My question is, how big i can go on the tires? On the full susp i have 2.2 Trail King with 55-584 on the back and on massive Mountaing King 2.4 60-584 on the front. I like the grip but sometimes i feel like the front has a mind of it's own :). Should i go 2.3 or get the rims from my hardtail?
Thank you!
I live about 30km away from the pole bike factory
#AskGMBNTech is okay to have a wider rear tire than the front tire in a rocky trail?
#AskGMBNTech
I have a non tapered (trail HT) frame and i will buy a tapered fork and install it with adaptor for tapered fork, my question is does the non tapered frame with tapered fork and adaptor has the same stiffness with the tapered frame and tapered fork?
#AskGMBNTech
Hi I'm really enjoying the content you put together each week. Could you recommend a good light for riding my local woodland trails now the sun is setting earlier. Would only running a bar mounted light be ok or would I need a helmet one as well?
#AskGMBNTech
Hey guys! Love the show!
So I'm planning to buy a Magura MT Sport brake on the front and I'm wondering what (180) rotors should I buy that is compatibe with the semi-metalic pads on the brakes?
#askgmbntech I know this isn’t your usual question, since it’s about a very specific type of bike, which you normally not cover.
But could you explain to me why the newest generation of wheelie bikes (like the Collective C100 for example) opts for a geometry that was the norm for Cross Country Mountainbikes at around 2008?
Almost 70 deg headtube angle, 71 deg seattube angle, pretty high standover, the same toptube length as the bikes back then etc.
Why is this geometry considered especially good for wheelies?
I was very surprised when I found out about these bikes geometry.
Usually the wheelie bikes were scaled up BMX cruisers, which were pretty decent in terms of riding on your back wheel, so why the drastic change?
Also would I be able to build myself a nice and cheap wheelie bike with the XC parts from back then or is constantly riding on the back wheel to much stress for these lightweight parts?
P.s.: I love your show, you’ve all came such a long way and made something really special out of it!
Thank you for your amazing videos and all the great advices.
It’s so sad to see Henry leave, since he grew on me so much from the first time I saw him.
I wish him all the luck on the world on his future paths, and hopefully we’re able to see him in front of the camera again one day.
#AskGMBNTech - I just bought a 2021 Fuel EX8 XT and took it on a few rides on my local trails. In getting the bike dialed in, which would help with too much bounce off small rock and root chatter? Rebound or Tire psi changes or both? So far I have set the bike to Trek's factory settings but added a few clicks of rebound since , and dropped from 30 to 25psi front and rear and that helped a bit but its still not really there. anything you can recommend would be appreciated. I don't plan to do many jumps , its mostly just trying to smooth out the rock gardens and trail chatter. Thanks!
#AskGMBNTech how do you make XCM SR suntour softer
Does it really matter though ?
Yes, half a degree probably doesn't but 71 vs 68 vs 65 is noticeable even by a newbie. Though it probably makes less of a difference than when I forget to adjust my rebound damping and pogo off a rock, lol.
#AskGMBNTech
Hi, I am a tri and gravel rider from Hong-Kong, and ready jump on MTB right now.
I got a Lapierre Spicy 527 (2017) old stock from dealer, it has a 170mm travel fork and 230x57.5mm shock with 165mm travel, I want to change a coil shock for better traction (that’s cool).
Unfortunately, 230x57.5mm size is rare on market. But I saw a lot of same E2E shock with little bit longer stroke, any problem if I mounted a 230x60mm? I guess it will not change bike geometry.
Love your show, a GCN and GMBN fans from HK.
#AskGMBNTech
Are you guys ever going to get an app like GCN?
Hi GMBN. I am looking at getting a new bike in the foreseeable future. I was looking at a 2019 slash 8 2nd hand but the 2021 slash 8 has a degree slacker head angle. How much of a difference does this make and can an angle set be fitted to a knock block headset?
Thanks
Love the bike design czcams.com/users/postUgkxHL1v1R3NE5x4KiYfyt8dnQmyNYz7qi5L and functionality. It is hard to align the front tired to center the disk brakes. The brake wheel touches the stationery side of the brake caliper and pad. I aired the tire up to 40 psi as the markings say 40-60psi. Left the house for a few hours and came back to an exploded innertube.All in all it seems to be a good bike. Have not ridden it yet though so that's the max of my knowledge. Update, put a new innertube made sure the tire was set properly and it did the same thing in under 20 minutes as second pic shows.
#AskGMBNTech is there a difference in performance of having a tapered fork head tube rather than a straight head tube. Why do they make them tapered??
It's the fork.
By being tapered they can make the fork lighter and stiffer.
#AskGMBNTech Great show! I been meaning to ask: I reinstalled Shimano calipers on my bike after buying new pads as I started using the not so old Jamis Durango SX, the issue is: the back brake caliper doesn´t align properly with the disc or wheel (I've already tried trueing the wheel, checked for a bent rotor, also tried with different wheels), so the rotor and the pads rub to the point where the wheel it's not moving at all unless you apply force. I've tried many of the troubleshooting on your videos to no results, any ideas?
#askgmbntech
I just took my new bike out for its first proper dirt ride. I noticed my brake rotors would rub for a bit after hard braking (say, before a corner), and then be fine when I would stop and spin the wheels to check. Is this anything to worry about, and if so, what things should I check?
My brakes are shimano deore 2 pot hydraulic. I did swap the hoses from UK style to US style setup, and it doesnt feel like I left any air in there. Doubt it's relevant, but this is on a voodoo mambo HT, 180mm front and 160mm rear rotors.
#AskGMBNTech
Hey guys! great segment!
My question is: What dictates the size of the sprockets on the rear durraileur?
#AskGMBNTech.
Hey guys, I just got a maxxis minion DHF tire and it’s not the tubeless version. Is there anyway I can go tubeless?
#AskGMBNTech What is better for climbing a full suspension xc bike, or hardtail trail bike?
The only problem I have with the Mighty Grim Donut is the color - it should be pink!
If you have a problem with this, bookmark this and come back in 15 years to tell me how wrong I was.
#AskGMBNTech what does the way the rear shock is positioned do to the bike?
#AskGMBNTech I have Merida one twenty 9.600 that has only 120/130 travel, is there some way to add more travel or swap to some more travel components?
For someone who wears or 400 lb what's a good mountain bike I was thinking about getting a full suspension aluminum or steel frame weight doesn't matter on the frame size so wanting to ask you it's a false inspection by good for a person who weighs over 400 lb if not what if he gets a heart tail for me
I am not sure the suspension matters in terms of the frame not breaking. I broke my fully. At the rear. But definitely go steel. Think oceangate. Steel can take what it can take over and over. My Alu one broke doing nothing just a curb. Fatigued
#AskGMBNTech I have a 2019 Specialized Stumpjumper ST Carbon Comp. It has a head tube angle of 67.5 degrees. What information do I need to know to find out what angled headset would be compatible for my bike? Can you suggest a sound option? I would like to slacken the head tube angle to 67 or even 66.5 degrees. Do you think this is a good upgrade as most short travel trail bikes are now running angles in the 66 degree range?
#askgmbntech hy guys, what do you thought about 120mm rear (less sag) and 150/160mm front (more sag more volume spacers), if riding characteristic is not a problem, then what possibly happend to the frame? Is that safe for aggressive ride?
Have a great day!
Thanks!
anyone else think the thumbnail was the grim donut at first glance?
#AskGMBNTech I’m looking at a cube it’s a really good bike but I don’t like the colour.Should I do a custom paint job
#AskGMBNTech what bikes are manufactured in the UK? I've been looking at full sus trail/enduro bike. 150 or 160mm travel and there doesn't seem to be a lot to choose from when looking for a UK manufactured bike.
#askGMBNTech
Hi guys! Slightly different question for you this week... I recently broke my collarbone out on a ride. How long would you expect it to take until I can get back out on my bike?
#AskGMBNTech What is the best way to convert my 3x9 Shimano Deore to a Shimano 1x11 shifting system? Thanks, Wilko from Berlin, Germany.
#AskGMBNTech I've come to do a deep clean of my drive train but my SRAM GX Eagle cassette seems to be stuck on my XD freehub. I think I've threaded either the freehub or the cassette. Any tips on removing it?
I've removed and mounted it before now, when mounting it I've given it a good amount of lube and torqued to the specifcation given by SRAM but this is ridiculous, should I keep to these specs or just go by feel next time?
#AskGMBNTech Gents, contemplating upgrading my worn 11 GX drive train. Many of my friends are riding 12 speed all summer and often complain that they are forever indexing gears because it's so finicky. I've not ridden 12x and my legs can push the 11x. Stick with the old faithful? What's your opinion?
The 12 speed SX derailleurs are made out of Cheese, dried custard skins and Chinesium - avoid :(
#AskGMBNTech
Hey GMBN Tech Team, what do you think about this? I have a Voodoo full sus bike. I have upgraded wheels, tyres, brakes, drivetrain. It has decent Rockshox Sektor forks. The rear shock is Suntour Epixon. It seems to be a less common size. I could get a RockShox Ultimate Deluxe Debonair for £350. Do you think the better performance would be worth it?
#askgmbntech For the past few years Shimano promoted the benefits of direct mount rear mechs, and seem to still be doing on road groupsets. The 12 speed mtb rear mechs look to use a standard mount, have Shimano given up on the direct mount standard?
#AskGMBNtech why does the rise of the handlebar really matter
I’m thinking of getting a specialized sx trail which has 180 ml travel. Will it be able to climb? Thanks #AskGMBNTech
#AskGMBNTech.
Hello what is the best brand of trail full face helmet and one that doesn't have a price out of this world 😁............. I love every single one of your videos...... Thank You!!!!!
#AskGMBNTech
I have a nukeproof scout that I ride on very steep and rough downhill (it's super fun and is actually improving my line choice) it currently has the 140mm fox 36 rhythm that it came with, I would like to upgrade to a 150mm fork and have been looking at the mrp ribbon coil.
My thinking is that the coil fork will give much needed extra grip on the rough stuff(is this correct?) but I'm not too sure what it would do to the geometry with the added 10mm of travel and different axle to crown length
#AskGMBNTech I love your show, and I am building a bike, what dropper post should I use?