Bottom Bracket Standards Explained | Road Bike Maintenance
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- čas přidán 22. 05. 2016
- Step into the bottom bracket standard maze with Simon Richardson. Don't worry, he knows his way around.
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BB30? PF30? Octalink? Hollowtech? The world of bottom bracket standards is about as complicated as it gets in cycling. Simon explains all in this video.
Watch more on GCN...
How to change a threaded bottom bracket ▶︎ gcn.eu/1VfBdFW
How to resolve bottom bracket creaks ▶︎ gcn.eu/1TuyjIR
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Leave us a comment below! - Sport
I didn't enjoy this video, but I did need it. Thanks for the tough love, GCN.
Zach Bonte ثي،6ص
Those words I was looking for to describe my feelings
I love my old school square taper bottom brackets. They are very simple and easy to work on, and there is a sea of aftermarket cranks to choose from. No creaks either.
I think the manufactures are confused about the definition of the word "standard".
agreed.. standard should mean: once one is published, if you want to be standard as well then you need to follow what's already out!
Lmao, I think alot are confused with that! They put alot of labels and they don't even apply!
Some new person or company comes up with something new and starts to change the whole industry by trying to get their new stuff labeled standard to change the whole industry , if it's better may be debatable in a small percentage of the time .
We as cyclists are good at suffering and I've done mine for the day. I watched that the whole way through.
These videos are extremely helpful. I've been a bicycle mechanic at multiple shops, but there is always something new to learn. Thank you for the details, and the presentations in these videos makes the learning process much easier. I'd recommend these videos to anyone (novice or seasoned rider/mechanic)
Don't worry, Si, this video was quite handy. I'll watch it before I go to sleep.
Wow. Simon, you are a BB King. No wonder you've got the blues... :(
That's a pearler! What a comment! Haha love it.
Comment of the week
Comment of the year right there ^^^^^^^^
KKKKKKKK
I saw what you did there. Brilliant.
I just have a $60 Huffy cruiser that I ride once every other year, so I think I am in over my head watching this video...
Absolutely love your sense of humor. Thanks for making a topic bearable to watch!
Long live threaded Italian and threaded English brackets! They simply don't creek as much! Super important if you build your own bike : )
yes well agreed i have one too,
More videos like these! I thought it was awesome how you talked about the chronological order of each, sizes and methods of attachment and compatibility. Great video, Si!
well done Simon! I can't believe you managed to keep that to under 8 mins and explain it so well. Top class.
You've got to be one of the best talkers on CZcams, always a pleasure to listen to you explain things.
This one of your best videos ! Great job deciphering all this mess.
I give up! I'm buying a motorcycle.
It is cheaper lol.
hahahahahahah nice one!
Lol
had to re-watch this twice to get the info I needed! Simon deserves a promotion for explaining this, it must have been worse than watching paint dry then followed by grass growing.
But what about BB-8?
You can leave, now!
+mrsherlocked will be hard to fit in your frame ;D
Hi Si, thanks for informational videos. I changed my BB and the bike is riding like new. you have a calmness but confidence that helped guide my way. No more creaks!
All you actually need to know: Hollowtech or similar external threaded bearings (Mega Exo etc) are awesome. Anything involving bearings pressed directly into the frame is annoying, fiddly, stupid, hard to work on, creaking, unreliable, potentially frame-destroying crap that should be avoided.
I agree, still have to deal with press-fit headsets though, argh!
thanks very much for this! bottom brackets have been something i haven't been able to keep track of, so this was super informative and helpful!!
GCN is the best cycling resource around. Messed about for ages trying to figure out how to repair my bottom bracket. Watched the first 30 seconds of this and new exactly what to do.
I genuinely needed this! Can always rely on GCN for help :D
I literally JUST bought a crankset for a bike I acquired on CL and don't know the first thing about bottom brackets. Thanks for such a cogent and thoughtful presentation. You ROCK.
my fave GBN personality; funny as hell. rock on Simon!
Legend! Thanks Simon! Saving this video for when I do my bike build. Golden rules!
This was educational for those of us kind of new to road biking, thanks!
this is actually really good and informative. thanks GCN!
What an informative video, this is good information to know.
Yes :) Finally BB hell has been explained. Cheers mate.
Thanks GCN! You just saved me a lot of time and my headache switched from BB-standards to consider wether to stick with my BB30 power meter or "upgrade" to a new more compatible one... :)
Excellent video, dude! Thanks a lot here from Brazil.
the primary advantage of the square taper spindle cartridge bottom brackets is you could select a spindle length that would allow you to position the crank in any line that you would want relative to the cassette. doesnt appear that any of the other systems would allow for repositioning of the crank.
Thank youuuu!! Love this video.
Good job GCN, this is the first time I fell asleep watching one your videos.
Thanks for this video. Very informative. Once I was confused, but I have more clarity on the different types of BBs available. Maybe you can do one video on headsets too. Threaded, non-threaded, integrated, semi-integrated, press-in cups....etc. Really got me head spinning when I was building my dream bike from sourcing all my parts online a while ago.
thank you guys! i'm one step closer to understanding this :-)
Thank you so much for this info! Great to know!
I'll stick with my Hollowtech for now as it's cheap and easy to service and it certainly doesn't creak.
I've got a titanium frame with PF30, without the bearing press tool.
I just pushed the cups in by hand as far and as straight as I could, laid the bike on its side, and placed a flat piece of wood over the cup then knocked it in with a rubber mallet.
Worked like a charm.
Some of my frames are 35 years old and I have no problem servicing them. But I can't imagine a pressfit BB frame still performing without creaks after 10 years. I find it depressing that modern frames are disposable.
Very nice, love it.
Great video. As always.
Really clear - thanks
Good explanation!!
Thanks 😊
Salute to you sir. You managed to sum up +20 yrs of tech progress (or regress) in under 8 minutes. My take is this is a classic case of manufacturers just going out there to create their own systems and calling it new tech without doing us mere mortals any favours about ease of maintenance, compatibility, functionality etc so they can sell more bikes and components.With BB design, it may benefit a 'if it ain't broken, don't fix it' type approach.
Sure glad I changed out the cranks on my Atala back in '74. A lot fewer choices to worry about.
No one ever improved on the conventional threaded bottom bracket. All these pressed bearings are just cost savings passed on with the tagline of "increased stiffness". If they only put them on exotic bikes I might believe them....but does anyone really think an aluminium hybrid bikes needs a 10% stiffer BB? Threaded cups are expensive as they are a component unique to cycling, they require increased labour at the OEM factories to cut the threads. Press fit bearings are just bought from a catalogue, its a task every engineer is familiar with.....going on the skf catalogue and choosing a bearing. They even give you the CAD model.
BB30 is nothing more than a roller bearing with an inner diameter of 30mm and an outer of 42mm. You can get a bag of 50 of those bearing for under £5 from a bearing specialist, some don't even bother counting they just sell by the Kg.
But don't fool yourselves...its not like they use high quality Japanese bearings anyway!
No kidding. Not only is it awkward to put on there's little indication if that standard will continue to be used. Bsa forever.
Axles are a bigger headache now that QR isn't the only option for road bicyclists now and companies are figuring out what to steal from mountain bikers since disc brakes are popular.
+seanek9 Threaded bottom had their issues. First off, Italian threading needs to go the way of French and Swiss threads into obsolescence. I noted decades ago that bottom brackets were too narrow and too thin. Funny thing is that external bearing bottom brackets have addressed both concerns without requiring any changes. Right now your best bet is a British threaded 68mm bottom bracket with external cups.
+Bill Oooo'Reilly mainly because the stiffness comes from the frame not bearings and crank has very little to do with it too. So BB type doesn't matter, just depends on what standard the manufacturer uses. So basically, and Si did say this, different bottom brackets are only there so the manufacturer can say they've done something new. Doesn't matter which one you have they all work the same and there's a converter for everything now. Rotor makes two bottom brackets that will fit any frame and any crank so just get those two, any bike you want and any crank you want. Also, everyone will say companies scam you and it seems like they do, but it's not just bike companies. For example I work in a restaurant and food for 100 people costs under £250. Can you do that shopping in your local shop? So restaurants are a scam too? And you eat at them I assume.
Bmx bikes use press fit bb, they must be better for certain aspects otherwise they wouldnt be used to this day even on bikes that cost over £500-£600 and above
Everything in this thread is true. The main thing to consider is that press fit “standards” , in most cases are very simply poor engineering designs.And most frame’s shells are even more poorly manufactured to PROPERLY accept bearings so they will spin proper and last a full service life. AND you get to PAY for this crap on your high end bike. Many bike companies have gone back to threaded. What does that tell you?
Just went from square taper to Hollowtech II BB and the difference is night and day imo. I Will never go back to a st bb ever again.
Love this video. Helps me sleep
Helped me soo much! Thanks m8 ;)
... making a Look 595 an outstanding frame choice, given its threaded bb and awesome features
Big thanks for this video. Now when bottom brackets come up in conversation I can just pull this video up and show my friends why I hate bottom brackets so much
One nice addition to this video would be to explain changing a press fit to threaded. There are a few companies who make those.
one nice addition would be to advice any buyers to stay away from press fit altogether and make sure whatever bike you buy is threaded... I seriously used that as a disqualifying mark when I was buying my last road bike, any non-threaded BB frames where automatically scratch from my list.... Maybe it makes sense for pro racers that do not have to give maintenence to their own bikes and possibly get a new frame every year... but for a bike enthusiast or even for an amateur racer who has to suffer through long rides with creaky BB I think press fit makes very little sense.
LOL... you guys are great! this vid hurt my head!
Very informative
Good job! 🤓
4 weeks earlier and this video could have saved me a lot of research :D good vid though!
Congrats Simon! you managed to say "bottom" more times than in any other GCN video.
I have FELT F5 with BB30, after 5 years I replaced the bearings for $25 last year, very happy with. I think I will stick with BB30 on my next project Chinese Carbon bike
That was a head fuck.
completely head melting! as much as I don't want to, I think I have to watch this again to really get my bearings on this! 😂
RT1, my own standard: one side threaded the other one pressed but the pressing surface outer ring is not completely round so you need a special bearing press and the crank is 20.1mm on one sied and 20.2 on the other side (the whole thing is set up that your frame cracks when you get it wrong)
1:18 Haha haha funniest thing I've heard all week!
BSA bottom brackets 4ever. I hate creaks.
I'll keep it simple... I'll stick with the old square one... it works.
That works, I just changed my type of bottom bracket and I’m really happy with the external type
I didn't know there was that many types of BB :P , i'm still using square taper on my MTB and hollowtech on the road bike , the square taper BB had to be replaced for a new one after 14 years service and many thousands of miles , compared to hollowtech they are really heavy but bomb proof , I recon hollowtech will still be here 20 years from now just because like square taper it works and works well
My Cannondale CAADX 105 SE (mileage 1200km or 600miles) makes all kind of noises, from creaking to clonking. Amazing what sounds a cyclocross, that has just been ridden onroad, can produce. My first and last Cannondale.
I feel for you. Have you heard of Hambini bbs? Hes on CZcams.
@@johndef5075 Thanks mate. I got rid of the CAAD already tho, it wasn't worth it
any advice on loose spokes during ride, some unwind and start to rattle but they were tight before the ride
my favourite is square taper cup and cone - riding on proper 1/4" bearings will always be better than most of the toys shown here
Every minute of your life is one you will not get back. Good info, although you didn't go far enough back for me to find out what I needed. I'm restoring a 60s Monark Speed Racer. Weird stuff down there.
Great video, Si! One question: what about asymmetric BBs? Are these pretty much always 68mm or are there different sizes?
What about a rotor 3D+ Crank (longer 30mm axle) into a bb86/bb86.5/bb92 frame with Pf4130 bottom bracket?
OK are sealed units any good durable as is it cheaper to just replace the bearings on my old original bb axel
can you fit a crank that is fitted on a thread type bb to a pressft one's? tnx gcn
So here's a conundrum. I have a bb30a which is 73mm wide so normal bb30 cranks won't fit but if i get a threaded converter for the frame can I fit the longer length crank axles? Obviously you'd have to factor in that the frame is wider and the BB sticks out further, so would it still be too wide? Basically cannondale say only fsa, rotor and cannondale cranks fit their bb30a frames and other bike shops say otherwise
I have on old peugeot ps10 gold frame, with a strong light 35x1 bottom bracket. Is this swiss threading ? Which direction should I turn to remove it and what modern BB can I replace it with ? thx for the video
The great thing about 'standards' is that there are so many to choose from.
As I now own three bikes with press fit bottom brackets, I decided to bite the bullet and get a bearing press. Yes, it cost a good amount of cash, but I suspect it will pay for itself in the long run as I replace bearings in the various bikes.
Very educational video (thanks), which left me with a question.
Could I change my Ultegra 6700 groupset with a Campangnolo groupset (dont need it, just always wanted one)? Anyone???
My main concern is the bottom bracket, and I believe that I currently have BB 68 mm on my 10-speed 2010 Specialized Tarmac.
What would be the best approach to do the swap?
Thanks.
Works the way it is supposed to. Just Good
hey man, great vid. just wondering if you could clarify... the bike im buying has a sealed cartridge bottom bracket... i just want to know... is it gonna end up creeking like my walmart bike did?? i cant find the specs on the walmart bike.. this is driving me crazy
BB Mania 😲 !!
The bb386 it fits the shimano ultegra 6800 crank?
Well done! =
Hi i have sram gxp crankset, but the gxp bb is damaged, is it possible to use a regular shimano hollowtech BB and use the spacers of gxp that's left in my damaged gxp crank? Thanks in advance
if i have fsa square taper, what could i upgrade to?
I see coming in a near future the new "standard wars" about wheel axles. With disc brakes startig to enter road market, 12-15 PT, some with traditional axles, some frames include adapters, 9mm standard axle in the rear 12mm front... and that will affect your choice of wheels. Would be good to see a video about pros and cons, and also your idea/brands idea about what the standard will be.
About BB, as it was determined by frame manufacturer, now is another thing to look at when you choose your frame or bike. I am afraid of making the wrong choice and not being able to find BB or chairings for my axle in the mid future. Until now, Shimano is the best bet in terms of longevity in catalog, and actually much prefer threaded. Unfortunatelly, in mid-high end bikes each time is more and more difficult (even impossible) to get threaded BB. So, this video is ok, but I think is worth another one just about which one to choose.
Also I love the look of internal cables, but I hate them deeply. But none mid-high frame has external cabling any more.
hi i have one old bike with DA9000 with shimano hollowtech hub on regular specialized allez alumimnum frame
now i got a carbon trek bike with bb30 bottom bracket fixed to the frame and FSA Energy cranks on it.
My question is can i just simply swap the cranks to one another without replacing sa Bottom brackets?
where can I find what kind of BB does my Scott addict 30 has?
I have a press fit OSBB bottom bracket on my 2009 Specialized Roubaix. Will any new crankset fit this? How do I decide what new crankset is compatible?
Can I use mountain bike hollowtech bottom bracket on my road bike?
Hello, my bike has a shimano bc1 37" x 24" road bottom bracket. What
shimano COMPACTcrank set should I buy that is compatible to this bottom
bracket? Thank you in advance.
Thx Si. Yet another reason I ride only lugged steel with English BB.
BB30 was used by manufacturers for 1 main reason - Cost. According to an article i read, it saves them 5 dollars per frame during manufacturing.
I'm not sure that's entirely fair to the manufacturers. There are some solid reasons for it, it's just the execution from some manufacturers lets it down from time to time.
+Simon Richardson there may be some reason. But the main reason is ease in manufacturing which translates to savings. Ill try to dig that article about how much the manufacturers save by not having to have threads on the BB, but if im not wrong its 5 dollars per bike.
I do believe it allows greater flexibility (lazy design) in frame design in that area as well, though I still prefer threaded BB for the reasons in this video.
learned that from an article did ya?
Sticking with my english threaded 9000 BB for a long time.
Wow,i like it
Hi I have pf30 68/73mm frame ,can give me idea that perfectly fit crankset for sram or shimano..thanks
So close!!! These aren't quite the droids I am looking for.
I have a BB86/30 BB, does anyone know what that means and would Ultegra Crankset fit on it? I just bought an Argon 18 Nitrogen Pro Frame and am trying to figure it out
hi, can you do a tutorial on UCI Indoor cycling?Thanks