How to True a Bicycle Disc Brake Rotor
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- čas přidán 4. 06. 2024
- We take you through the ins and outs of getting an adequately true disc brake rotor in order to eliminate brake rub and extend the life of your components. Whether you are on the trail with an emergency tool or in the shop with a truing stand, this video has all the information you need to make your disc brakes straight as can be.
Questions or comments? Leave them below!
See all our disc brake videos in our Disc Brake Repair Help playlist ▶︎ • Repair Help: Disc Brakes
Video contents:
01:00 Tools Needed
01:23 Diagnosis
02:49 Truing on a Bike
04:01 Truing in a Truing Stand
09:36 Truing with a Dial Indicator
Tools & materials used:
• MTB-3.2 Premium Rescue Tool - www.parktool.com/product/premi...
• DT-2 Rotor Truing Fork - www.parktool.com/product/rotor...
• TS-4 Professional Wheel Truing Stand - www.parktool.com/product/profe...
• DT-3 Rotor Truing Gauge - www.parktool.com/product/rotor...
• DT-3i.2 Dial Indicator for DT-3 - www.parktool.com/product/dial-...
• Flashlight or bright piece of paper
For a text-based walk-through of this process: www.parktool.com/blog/repair-h...
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Did you know that Park Tool is the #1 resource for bicycle repair education?
• Visit our CZcams Channel: / parktool
• Visit the Repair Help section of Parktool.com: www.parktool.com/blog/repair-h...
• Check out The Big Blue Book of Bicycle Repair: www.parktool.com/product/big-b...
➤ About Park Tool:
Since our founding in 1963, Park Tool has been the leading name in bicycle tools. Our CZcams channel is an extension of our mission to be the ultimate resource for mechanics and riders of all skill levels. Here you will find comprehensive repair help tutorials for a wide range of components and processes, as well as troubleshooting guides, tips and tricks, and information on the latest Park Tool products.
➤ More Disc Brake Repair Help:
• How to Replace Brake Pads on a Bike - Disc Brakes ▶︎ • How to Replace Bicycle...
• How to Replace a Disc Brake Rotor on a Bike ▶︎ • How to Replace a Bicyc...
• How to Align a Mechanical Disc Brake on a Bike ▶︎ • How to Align a Mechani...
• How to Align a Hydraulic Disc Brake on a Bike ▶︎ • How to Align a Hydraul... - Jak na to + styl
This video is so good that makes me want to buy a disk truing stand, even though I only have rim brakes.
Lol
😀😃😄
Juan Araque: I agree. I got it so bad that I wanted to bend my rotor just to fix it.
agreed !
😂
Calvin is the man!
Parktools have a fantastic line of equipment, but for me what really makes this company shine are its technicians and their ability to teach someone like myself who's willing to learn all I can.
Thanks guys, you set your company apart from the rest!
There's something almost meditative about Calvin's tutorials. Another top video bud thanks again.
I accident removed the inboard pad adjuster set screw and it came out along with a spring and bearing. This is on a Tektro Airies disk brake system. How do I get this reinstalled? I don’t see a place for the spring and bearing. I also heard that they may not be needed. I adjust se set screw to the rotor, backing off about 1/4 turn. No rubbing and brakes were good. I rode my bike for 106 miles with no issues. But noticed, the pad adjuster set screw was missing, meaning it came loose and fell out.
No one comes closer to calvin and park tools in term of viewer-friendly, easy to understand video tutorials. Thumbs up!
has a mustache , i trust him
i bet if he gave you candy, you'd jump into the van
A botch for truing on a bike at 2:50 is to use an adjustable wrench! just make sure the jaws are clean of oils.
Calvin Jones, you are the king of bike repairs, thanks!
What this guy doesn't know about bikes. Isn't worth knowing! My go to when looking for any repair. Very informative and simply explained.
Perfektně, profesionálně zpracovaná videa! Díky!
setting the bar this high for videos, also covering any possible situation, Park Tool simply the best👑👑
Calvin is the best. Thank you for great tutorials.
Henrich Hostak 
Definetely follow Calvins advice...
I ever tried putting the rotor on a flat working table , and looked from the side , after spotting the bended area ,I marked and used mallet knocking several times and it worked 🤫
I hope you get more and more subscribers. Your channel REALLY is very helpful. Simple yet very effective tutorials. Thank you.
Calvin, is the swamy of bike repairs...always good videos. 👍
It seems like the ideal thing to have would be a way to have a reference plane of the rotor down by the hub to better determine if a deviation needs to come in or out at the braking surface.
These videos are incredible. Thank you so much ... I’m buying all the stuff !
oh man Park Tool.. another Dynamite video... well explained and great to watch.... thanks
Using a runout gauge seems very precise!
Very helpful tutorials for a beginner's like me.
@Ian Brown why?
@Ian Brown damn, thanks. I'll be more careful with leaning my disc-brake bike. cheers
Nice presentation and easy to understand...
Thank you
yes... good info... nice presentasion...
This is extremely helpful. Thank you! 👌
Amazing tools, great info!
Wow i saw all videos of your park tool its fully awsome it is very useful for me thank u so much
i use an adjustable wrench to bend rotors. it works like a charm. plus there are thicker rotors out there that dont work with this rotor bending tool
This was super therapeutic.
That was super helpful. I've spent hours making a rotor seemingly worse. I'm going to try to use the trick of sharpie numbering and I have the park truing stand and the rotor truing tool
with those tools, i spent even more hours to make it worse.. i hate rotors.
Isso que eu chamo de serviço bem feito!
Tnx so much calvin, have a good day
Some of the best videos on CZcams by a mile very professional
very well demonstration，multi angles is awsome
Really very helpful Park Tools 👍🏽
This was a majorly helpful video. I can do this!
Great video thanks Calvin
excellent video as usual.
didn't have the tools he mentioned. just used long nose pliers and a flashlight
whatever fits your budget. i do the occasional work-around, too.
Fantastic tutorials! Wish the search algorithm displayed Park Tool videos before SickBike garbage.
eu tava esperando esse vídeo, era umas das coisas que faltavam!
It easy wend you have a good tool ! Thanks for video ! Regards !
wow youre the man!
that's like me trueing my 4 jaw chuck on my lathe , a little at a time , Great vid ,
Rob NSW Australia
This guy clearly know his stuff. I hope I can send my bike for him to repair
The point is to do it yourself using the tools you buy from them
Full professional video! Thank you very much!
Nice one very helpful
Very Very helpfull! THANKS A LOT!!
life saving as usual
Awesome video.. sucks that both of my new RT86 rotors are warped causing actual wheel slow down.. I bought the park tool bendy tool but have a Bike Hand truing stand so probably do on bike ..
Very very helpful... Thanks...
A small or medium size adjustable wrench is a good alternative for the Park Tool DT-2C Rotor Truing Fork.
Great tools.👍
thanks
Calvin should be brand manager
Looks Fun.
Your a Pro!!!
I would never a tool for that, and i´ve done it thousands off times the past 30 years.
how about a bent axle on a freewheel? does it affect the rotor going back and forth?
u can do the alignment laying down the disc to smooth heavy metal then place a piece of wood 1x2 on top of the disc and try pounding it with a rubber hammer but not so hard, start with a light pounding going harder and harder as you examine the improvement.
It would be surprising if that worked, as it is hard to check the small tolerances needed against a flat surface. However, there is only one way to find out. The worst thing that will happen is you end up buying a new rotor.
Nice one 👍 👌 👏 😀
~10:30 "If the rotor doesnt improve in a few minutes ... " Calvin over-estimates my mechanical speed :P Thanks for the great video as always!
Never had the need to retrue my hope V4 vented rotors... 😎
Wow that dial indicator is awesome!
How do you know when to replace a worn out rotor? I don't mean bent, I mean like it gets used up. (If that's the case at all)
Each manufacturer has their own wear specifications. However, if you can see that the rotor thickness at the braking surface is different from the rotor arm thickness, it likely needs replacement. - Calvin
Park Tool Awesome! Thanks Calvin
Wow...!
good
This is good with a little patience
cool!!
Nice
Hey Calvin! How is it that you got so warped and is there a tool for that?
Can this be done in local bike shop? Or can it cause some long term damage?
Excelente video pero sería bueno que lo pudieran subtitular o traducir al castellano , éxitos saludos desde Argentina
Sram x7 or slx set? Which one suggest?
Just wondering who would put their sausage close to a running disk brake.....if you know what I mean ;)
Underrated comment
better question is... who wouldn't?
Where can I get that wheel aligner?
I'm thinking about installing a disk brake on my brake calipers bicycle but a didn't find any good video about it. Any recommendations? Thanks in advance!
Our series on disc brakes is still in the works at this time.
you guys know how to make a video. Long live Hollywood
We're actually based in Saint Paul, Minnesota, but we'll take the compliment!
if it was Hollywood, Sam Elliot would play Calvin.
How to use dt-3 tool without truing stand!?? Tnx parktool....
If you sight the gaps on either side of the rotor in between the brake calipers you can true a rotor very well.
Loved the hotdog!!
I tried all methods on my Shimano saint brakes with Hope Floating rotor and red Gaffer pads. First I tried to straighten the rotor by looking straight down at it. This worked rather well actually. I had just done service to the fork so the caliper was not in place. Once I was satisfied with how straight it looked, I braked with the lever and fastened the caliper in that position. This helped a lot, but.I still had some minor rubbing here and there. I couldn't be certain of which direction, even when I looked inside the caliper, so I just chanced it and straightened it in any direction. If the rubbing got worse I straightened it in the other direction. Lil' bit'll do ya!
I find that the two piece floating rotors tend to wander a bit and cause a small amount of rubbing. Not a big deal. Just a lil noise.
@@parktool Thanks for the input, and you may be right. I have even had to straighten the Hope vented rotors, even though Park tools doesn't make the tool for such a big rotor.
I just wanted to mix and match saint and hope parts to reduce the on and off feel of the saints. But after trying it today, the saints are too darn powerful to not have quite a lot of on off feel still. Could be the saint levers that pushes too much oil at once. I can try with XT levers and see how that feels. The Hope Tech 3 levers should be mounted on a harley davidson, being quite big and slow 2-finger levers. Hope uses DOT 4/5.1 and cant be mixed with shimanos mineral oil sadly.
What size rotors are you using? I find that sometimes one step down in rotor size can gain quite a bit of modulation, if you are willing to give up some power and heat dissipation.
@@parktool I weigh 110kg/242Ibs geared up. I can feel when a brake is to weak to stop me. :P This is the reason why I started modding my brakes in the first place. Even new Shimano XTs on 180mm rotors are to weak for my fat bottom. Now I use 203mm rotors exclusively with Saint or Hope V4, and sometimes a bit of both.
@@rewind9536 my friend is 115kg and he uses xt they are they powerful!
Park Tool👌🥀
I'm still waiting a kit that have every single product of park tool
PascalGame indonesia lmao they have thousands of tools
Benotto México oficial page has one, it's named park tool master kit.
How does it bends?
What giant wheels are they
I love this guy. He explains so clearly and comprehensible. And don’t ever shave away that mustache :-)
Always remember to never get your pee pee stuck in the rotor
P P Rotor. That's my next video game characters name
Instructions unclear...
Mike Chivy I know right I’m glad I don’t have that problem with the va-jay-jay
Apologies for chiming in but I don't know who else could give me reliable advice. I recently bought - not yet installed - a Deda Elementi 120mm stem (model: Superzero), which has a clamp height of 36mm instead of the usual 40 or 41mm. Will the reduced contact area between stem and carbon steerer tube (Cannondale SuperSix Evo) potentially endanger the integrity of the carbon steerer tube? Thank you in advance for your reply.
A big fat negative. The steering tube is not made by paper, just don't over tighten it.
how do I fix bearing play at the hub? when the wheel is on the bike there is play but of it there isn't any, so what do I do?
It depends on the hub and bearing design. Remember the wheel extends the lever to check for play. When the hub is out of the bike, there may be play, but because you are moving the axle only, it may not be obvious. The "cup and cone" designs can be adjusted for play, using cone wrenches. If it is a cartridge type, the outer nuts or sleeves should simply contact the bearings. If the cartridge bearings are worn out, they must be replaced.
-Calvin
thanks Calvin
O
I keep running into a problem where the area where the calipers mount on the frame isn't quite flat so the only way to get the brake to stop rubbing is to warp the entire rotor into a dish shape or have the pads really far apart?
It is most likely that the brake mounts are not flat and could use facing. We do make a tool for that which your local bike shop may have. It is called the DT-5.2.
Dump the QR... use thru bolt or thru axle less rotor bending
1:43 Is that black "nut" cracked on bearing plate hub?
Thats just a hair. No fun cracks to deal with unfortunately.
My new bike from big box came with the front rotor vented. It is cheaper and faster just to buy a new one?. Thanks.
An inexpensive one is great to practice on. Give it a shot straightening and then you have a little more knowledge. Then if you cannot get the rotor straight or it is not going well, then replace the rotor. Many rotors are slightly bent from the factory and need to be fine tuned. I find this to be true at any price point for rotors.
Park Tool Thankssss. I will watch this video again. You are my source for my new hobby. A lot to learn here.
This guy is great no doubt about it. Well spoken and super mustachy hehe And i understand that they promote the tool they sell. But a special tool to fix bent rotors? Unless I'm missing something why in the hell pay for that when plyers will do the job? Park tools are great I am sur of it but also waaaay pricy But then again everything in the MTB niche market is overpriced so can't blame them
cheaper to take the bus then.
pliers open on a hinge, so it's hard to hold the caliper steady and not grip it too tight, marring up the surface in the process.
They can work in a pinch, but if you do your own maintenance (or use hydralic brakes) then getting the tool will save you a bit of a headache. Some brake rotors for downhill bikes are very expensive, and I'd hate to scratch a rotor that cost more then the brand new hybrid bike sitting in my kitchen.
Any tips of getting brand new M8120 Shimano 4piston XT brake pads to not rattle ?? Driving me nuts..
I have the same brakes and am dealing with the same issue. Will keep you posted on the solution. As of now increased spring tension and added a bit of protective tape where the fins meet the caliper body.
@@parktool lol yeah there are tons of forum threads on it but best advice was wait till they get full of brake dust. I have 2 other bikes with single pistons and the pads are def tighter in the caliper. I was thinking about either cutting and apply strips of gorilla tape or applying liquid electric tape (liquid rubber). I talked to 2 bike shop techs in passing, they thought I was crazy...it is driving me nuts..
@@parktool what tape did you use? Protective frame tape? I just don't want anything to heat up and get sticky..
Can i use a cresent wrench?
that's what I use and it does the job done just make sure it's not contaminated with oil or grease
Can't wait to win the Park Tool Tech Tuesday #100 Giveaway! I already have the DT-3 Rotor Truing Gauge in my Cart!
that sound @1:30 hehe
How do you determine the starting point of the DT 3. I see how u started here but what if the rotor was bent in not out to start with? The DT 3 obviously can't mount going thru the spokes?
The starting point is the largest deviation as that will touch the indicator first.
@@parktool thanks for the response. more specifically i meant. what if the entire rotor is coned inward and the entire rotor only needs to come back out away from the bike? then the tool wouldnt touch it anywhere.
This is not going to help you repair a cone shaped rotor. This will help true a rotor that is not straight.
I wish Calvin lived in my neighborhood and I could trade him food or beer for regular zen help
बेहतर है ब्रदर बेहतर
Calvin help i got DX 700 Shimano brakes the top are normal to bleed the bottom i cant find a bleed port only a allen key screw near brake barrel no nipple no rubber seal hiding one ? Need to push pads apart to align and bleed ! no nipple HELP PLEASE !
Hello Oleg, I am not familiar with the DX700 (cant find any literature on Shimano's tech site for them or anywhere online). Typically the Shimano calipers that have a small hex key and then a flush rubber cover over a port that is cast into the caliper body or there is no rubber cover but there is a port, require you to hook up your bleed syringe hose to that cast in port, then loosen the small hex key to open up the flow of mineral oil. The port may be at a downward angle making it hard to see. An image to tech@parktool.com would be help. Thanks, T.
Sorry their DX D-700 My eye,s at 50 are not what they used to be !
Hey could someone help me ? I bleed my brakes and it got really bad it’s only in my rear I sanded my brake pads and cleaned it and I cleaned the rotor and I bleed it again and it is still bad. Please help me thanks! And the brakes are Tektro HDC M285, Hydraulic Disc, on a Giant Talon 2
You are being as specific as saying it hurts to the doctor but not telling where.
How are they bad? What is the problem? What are the "symptoms" of said problem?
My rotor is very spightly bent and the pistons are pushed out how do i push them in?
Use a blunt, flat object to push them back in if you don't have a piston spreader.