Essential Press Fit Bottom Bracket Maintenance
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- Опубликовано: 28 сен 2024
- Press fit bottom brackets are commonly found on modern mountain bikes, but if installed incorrectly can develop annoying creaks. Doddy shows you how to maintain your bottom bracket to keep it spinning smoothly and noise free.
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Хобби
Do you ride with a press fit BB?
nope. all of my 5 bikes have threaded BB
I guess I do on my 2012 Scale 30, but never had to do any maintenance on those even though I ride through muddy german winters. Seems like the shop I bought it from did a nice job building the bike. But thanks for the video, in case they do wear out some day...
Yep, my 100mm hardtail, 8yrs - annual service, never had any problems.
Yes i got Hollowtech II , if i remove it, it might be a chance of religious conversion to another :)
I have a 2013 Giant XTC haven't had an issue yet with it, but I've been looking to replace it. Not sure with what though, Chris King or Crane Creek etc.
Doing a head set and Bottom bracket shoot out or comparison would be great!
Great video's from you guys as always,cheers!
Doddy the master of tech!
6:46 Shots fired :D
We finally found out what Doddy uses in his hair...it’s retaining compound!
Forgot to mention that you can also use a threaded rod, 2 compatible nuts for the thread on the rod, and a selection of washers of differing outer diameters but with inner diameters large enough to slide into the threaded rod. 2 spanner’s/ wretches for the nuts and boom, bodge complete
This is essentially what the 50quid press is, for no more than a tenner.
Thought you were the king of bodges doddy!!!
As a sponsor I dont think park tool would like that so much lol
Guess it's park tool zip ties next!
Ain't gonna work, the different washers will move all over the place and the cups won't alingn perfectly.
@@pankulfon6067 I have the correct bearing inserts that go inside the cups which slide along bolt being compressed by washers and nuts
“Something of little to no value” the GCN apron. I love a good joke about road biking like that.
Haha!
MapleSyrupGuy loved that too xD
bob taco You mean 5/5?
Joke?
Savage
The cups that thread together are great. Press one side wrench the other in.
Wooow. Thank you so much. Its a little reminder for me because its my first day in a bike shop tommorow
My Liv pique has had a new press fit BB, Liv tech pages say use a thin film of normal grease before pressing new cups in. Worked fine, no threadlock nor primer needed. Carbon BB shell BTW, plastic cups.
Doddy can.you please do a vid showing how to maintain various types of suspension pivots typically found on full sussers. I think I mean suspension linkage but not sure what they are called. It's the moving parts of the frame connected with bushings or bearings. Never understood if these needed maintenance or servicing.
M10 threaded bar a couple of penny washers or even old bearings the same diameter as the BB, is a useful DIY bearing press.
This video couldn't come at a better time. My BB has been creaking for the past few weeks and just today it was particularly bad and really needs fixing. In fact it's so bad now that the crank wobbles a bit inside the BB!
That's in desperate need of work!
i have a square bottom bracket and it works perfect for me, with a 1x10, more than 4k km and 0 problems with the bottom bracket.
Yeah 4 km is ok but after 150 it starts to give you problems
@@camcleugh4312 4k km! 4000.
Awesome video. Doddy is the Don! Love the workshop area so much, wish my garage was like that. 😉
Dude you make it look so easy
It's all about practiced hands. And there's only one way to get there....practice!
Thanks for this, my N+1 needs press in and I was lost with al l the info on Bb's.
Thanks Doddy
Another entertaining and informative vid from Doddy!
Can you do (or have you done) an in depth video/series on wheel building and hub maintenance?
We're looking into it!
Thanks Doddy, another great video.
You using a torque wrench reminded me of something I've been meaning to ask for a while though. I know it's recommended to always store a torque wrench with it at the lowest setting but does this also apply to a Park ATD? I assume it does and always set mine to 4Nm after use but I can't find anything to confirm it online. I could just ask Park of course but I figure you'll know this and the answer may help more than just myself.
Been looking at a Commencal clash for the new bike. everything on the bike is mint other than the fact it’s got a pres fit bb, is there any advantage to a press for as oppose to a threaded one
Dude (or dode), you cracked me up with that 'something of little or no value' - GCN t-shirt joke! +1
14:30 I am feeling really attacked right now.
This was a really thorough video. Good work Doddy!
Can you use the seem tool for remove the bottem bracket when you use the primer AP-1 and the compound RC-1
Do you press in 1 at a time or both?
Don't forget to torque that crank up 16:20
Are the press fit adapter suppose to sit on the bearing or on the shell when pressing them in?
Is there a difference between the Park Tool Retaining Compound and some blue Loctite?
should the retaining compound be allowed a set up time before riding? Like a few hours or overnight?
Did you lube the axle before you reinstalled it?
Nice to hear that you also have the banging sound when pushing in the bracket. Experienced that on my wife's scott spark wc and was afraid I had cracked the frame. The only thing worse than ruin your bike is to ruin your wife's bike, right? 😉
In my opinion if you absolutely want Pressfit, it was to be once peace or two peace that threads into each other, for good even & secure fit.
I recommend watching Hambini's videos, he is an engineer, so if you want to know more about bearings, bottom brackets, take a look. ruclips.net/user/nrgizerbunny
Good job , but the bracket beraring removal no fit when use of punch hammer , slep bracket is light moviment no impact is better it s my opinion
Somtimes new stuff is not better than the old things. In my opinion pressfit bb a crap. Never head any issue with BSA threaded (hollowtech, GXP etc) bearings. And if there is any problem it is changed in 2 minutest.... cheap,easy and without special tools. I would say 6 of 10 pressfit bb have noise problems and so they start gluing it in ..wtf...
..... Greatings from Austria. Andi
#Askgmbn Could you cut a thread into the bottom bracket on a press fit bottom bracket frame for a threaded bottom bracket to install into.
it depends, if the frame is thick enough you can, but the frame will be more weak in that area, i dont recomend it.
No because the crank spindle wouldn’t fit in it then because press fit B.B. shells are lager than threaded
Just give it a go and send your clip to "fails and bails".
We doubt it very much because the width of the shell and the internal diameters won't match up to a threaded BB. Never mind cutting into your frame and weakening the structure.
Also just the thought of trying to cut threads straight into a carbon frame makes me shiver tbh.
Does anyone have a link for a good bottom bracket press? There are so many online options and I dont know which one I need. My bike is a 2018 Rocky Mountain Thunderbolt Carbon 50. (incase that affects things)
Hey up Doddy, does GMBN tech do tech product reviews, I am looking for a good action camera but not to expensive as I will probably smash it up, can you recommend any ?
We don't actually do product reviews, but we've been playing around with the Insta360 lately and it seems quite easy and good fun.
run it in to ground then just put a new on.or buy a bike with tread bottom backet
How to maintain a pressfit bb:
Step one: remove pressfit bb
Step two: buy a threaded bb
And how do you insert a threaded BB into a pressfit frame?!
Le Typ lol it was just a joke about pressfit bbs
Praxis Works make ones which thread into themselves. No more creaking!
@Michael:
Not everybody gets that! Keep in mind here's peops around asking most basic stuff on a weekly basis.
@James:
"no more ..." - heard that quite a few times! XD
Le Typ with adapters
I replaced my press fit with a wheels manufacturing one
Something worthless like a gcn apron lol🤣
fta
Too many commercials!
How to fix your pressfit bb; sell the bike and buy something with a threaded bb.
The worst idea they ever introduced to bicycles
something with no worth to you: shows GCN Bag lol
ManImErnst that’s a apron buddy
Bob Dixon whatever the joke was the gcn on it 😂
ManImErnst yeah it made me laugh how he did it so calmly
Press fit vs Threaded is a selling point for me. It's the first detail I look at when considering a bike. I will ALWAYS go for the threaded bb.
It's such a small factor (from the outside) and it seems such a dealbreaker for some. Super interesting!
Yes, very small but so important for me. I like doing my own maintenance, don't like creaking and don't want to buy more specialty tools. That tolerance will eventually fade and the bike will be worthless. It's what my brain thinks. I mean let's be real...is the slight bit of extra width that much better for the consumer? or is the majority of benefit going to production costs? just my 2 cents. (THANK YOU SANTA CRUZ!)
I see why people think that way really, maybe it's partly because people in general are reluctant to change? I mean how long has the BSA standard been around for now? If I can I'll go for a BSA BB myself but I won't let a good deal on a bike pass by just cause it has a PF BB. I got my scott genius for a few months now and haven't noticed any problems and in the shop I worked there most people never said anything bad about their PF BB we installed.
@@boomerangfreak in my case I have no problem to change to something better or just different, I had three bikes with press fit and all of them had creaking noises, I took them to big shops and they couldn't do anything to solve the problem, and in two of them the mechanic told me press fit is a problem. Since then I pay attention to my friends bikes and some of them creak and they just don't care, but they have the problem. Now, my current bikes have threaded bb and no one creaks. Just my personal experience
@@tomas7403 try using Loctite 641. I used it on pf86 with alu insert in frame (not carbon) and it shut the creaking up
*Fantastic*. Also nice to see this work being done on a dirty bike with miles on it, as opposed to a clean, brand new kit that comes apart easy.
Is there anything that could be used as an alternative to the Ap-1 compound?
Wait Doddy, don't leave us hanging--did this stop the noise from your bike or not?!
Perfect timing. My PF bottom bracket is starting to creak and GMBN Tech has got me covered. Love the detail in these vids. :)
Hi GMBN
Quick question have been interested in buying a trek fuel ex but have discovered it has the press fit bottom bracket..
What I'm really asking is should you avoid bike's with this type of bracket?
No grease on the axle before reassembly, I usually grease the axle and inside the seals?
Also, what are your thoughts on praxis or wheels mfg threaded press fit bb’s? I’ve generally replaced with one of these after a bit (or first creak) and use grease instead of assembly compound. Just curious on what you think.
Just us a large bolt and washers and nut problem fixed easy to get them back in that way and way cheaper
You gotta appreciate the proper procedure and the reality check procedure.
Everything functions properly ruclips.net/user/postUgkxHL1v1R3NE5x4KiYfyt8dnQmyNYz7qi5L Nothing was damaged in the box aside from a decal on the fork. The decal was missing a piece of a corner but I ended up peeling them off anyways. Assembly is easy BUT make sure you tune up the derailleurs. Both the front and rear need adjusting. I'd advise going to a bike shop but I opted out and put in 10+ hours with the help of RUclips. Ended up fraying a shifter cable but all in all I learned from the experience. The Brakes work well but the front caliper needs adjusting or at least mine did because the rotor was rubbing against the pads. Make sure you swap out the seat, grips, and pedals. For the short run you'll be fine though. I've read that this bike isn't built yet for hard trails but I just need it for the city. PA has some of the worst roads and being in a mountain this was a great choice. Worth the investment!
What if with the specialist tool, there is no movement of the press fit?! The pressfit is mounted in an aluminium Cube Mtb frame. The crankset itself was already covered with a lot of "dirt" (rusty looking fat, earth...)
The specialist tool slips from time to time when you are hammering to try to get the press fit bottom bracket out.
No succes so far, I let it rest a night after spraying it with degreasing/cleaning product. I hope this will help.
But some extra tips would be handy!
@gmbntech 6:30 don't be rude with GCN xD The workshop apron is of high value, even if the one from GMBN might be of higher value ;)
dude... seriously, you are making a video, thousands of people will be looking at it,.. you could not find 5 minutes to clean off the filth off the bike? good lord! were you raised in a barn? ... incredible.
When you took the cup out and noticed it was dry - That's why I do a fresh install when I get a new bike, bb, headset, even hub bearings. Sometimes they come improperly assembled - dry bearings, dry pressfits, no loctite, wrong torques. loctite 609 and 638 are good to have. Also, even thought the bearings feel good, might as well pop the seal, flush, replace the grease. Grease is a solvent and you don't know how "full" it is unless you look at it.
Why does he suggest the dreaded "long flat screwdriver "?? Yeah it may work ....but when it doesn't.
What is the cracking sound at 15:40? I had the same and I doesn't feel right.
Don't forget that all torque wrench accuracy is dependent on hand placement, you choked up on the wrench when you were tightening the chainring retention bolts.
Johnny Saudade the force at the fulcrum is not determined by hand position on the wrench and the force of the fulcrum is the only important number in the process.
That is a dirty bike ? Your crank is filthy ? ... Ok so I guess a new adjective is needed to describe my bike :)
Too the shop it goes, although easy, I don't have the compounds, cheaper at shop vs buying right compounds.. grr
Ive just got a scott 910 genius like yours but mine has shimano xt bb and cranks will it be a similar job pls cheers
Would love to know wich hub he ran on his bike at that time! It sounded amazing 🤤
If you have an aluminium frame, do you still need the press-fit retaining compound?
Crucial to get cups aligned but they don't want to go in aligned. Gotta hate press fit, such a poor design
So, who has actually maintained their BB like this based on this video? And how did you go?
Excellent guide! That said, _man,_ do I appreciate my threaded BB a lot more now. =) If I'm buying something new in the future, I'd want something like a T47 BB.
I can´t get the crank out... (Shimano Deore). It is making a creaky noise sometimes. :(
Love the vid Doddy & all those tools! But your missing and essential piece of gear that’s gotta be in any shop! A simple toothbrush... good for all those nooks that you gotta get squeaky clean.
Exactly! ... But park tool toothbrushes are hard to find.
Very good vid - the lack of views clearly shows that most folks take their bike to the local shop for even a simple job like this - that's life :-(
I'd recommend putting in one bearing after the other to get them in straight! Also i wonder why you didn't put grease on the crank itself before installing it into the bottom bracket?
fabianinthemiddle that’s going to end up worse though, the bearings need to be square with each other, so they don’t wreck the spindle
12:12 - chainring on the wrong side.
"something of little or no value" and pulls out a GCN t-shirt :D
Problems I see with press fit bearings in bb shell & integrated headsets is they eat away the frame.
I think I sohudl go with Chris king pressfit headset & threaded BB.
So far I got good experience with it, I usually notice wear of headset bearings after few months, or weeks with other bearings I tried.
the worst experience ever was FSA bearings on my fuel ex, on one bike the top bearing was crushed after just few weeks, metal shavings every where.
since then I swapped for enduro & cane Creek bearings.
but one one bike it wore faster than the other, maybe the frame has something to do with it, it also got a inwards dent, although it did not have an impact.
I will also stay away from carbon frames.
I have always found that press fit bottom brackets can be improved by the addition of a zip tie... threaded through the seperate bits to hold them together when you toss them in the bin.
I have 2 frames which some idiot designed to take this abortion of a standard. The one on my 29er is sorted out by a Wheel Mfg screw together BB fitted with Enduro ceramic bearings - jolly nice and built like the proverbial. The one on my roadie is sorted by a similar thing from KCNC.
It is my earnest wish that the idiots who come up with these ideas will be locked in a room with a loudspeaker playing non stop creaking noises at 150db morning noon and bloody night until they beg for forgiveness for being such insuferable tossers who thought they could improve something that didn't need improving.
Anton Vlasenko 😀 thank you
Don't hold back, tell us how you really feel.
Where can i possibly get dust seal replacements?
Hi i have a question, my crankset and bottom bracket is Sram xo1 with sram pf92 bottom bracket, i would like to change it to shimano crankset and bb, what bottom bracket from shimano should i use? Thanks.
Anybody know where I can get some Adhesive primer from?
Hi! Can you please make a video on Where to use grease and/or anti seize and what kind of those use? thank you
Hi Doddy, Love the channel. I probably seen most of it since I came across you guys.
Now during the forced holidays I decided to resume my XC bike build I was postponing for a while now, so I'm 100% ready when we're free to leave the house :)
Ive seen hundreds of videos on bike and new tech which keeps changing every year.
I got a great deal on barely used 29er with SRAM Eagle 1x12 drive and decent air fork. Frame I got is Merida Big9 7000, which I'll use to transfer the components to.
Issues I'm having is to decide on proper spacers for DUB PF BB92. Second issue is the headset which is FSA NO.55E (company web specs) but I have issue finding it here in Australia. Is there other headsets I can use? I'm confused with so many options.
Apologies if my questions seem trivial, it is my first bike build this century and so much has changed. Your channel is amazing and helps so much. Thank you guys. #AskGMBNTech
My $250 GMC Denali road bike has an ancient square shaft with caged bearings that is super quiet no noise even on lower gears. It's unacceptable that in 2019 a $250 bike with ancient square bracket caged bearings bottom bracket is quiter than a $5000 road bike lol. Get rid of this Press Fit garbage. Don't be a weight weenie build your legs.
Go threaded. Fuck all that pressfit bullshit.
Sees necessary kit........OK i'll call the bike shop....
Wow u let the Bb get that bad and it had no grease at all!! Shame on you 🤪 in Hawaii u can’t let the BB GET DRY. OF COURSE IT WAS CREAKING 😈🤷🏼♂️😱 I repack and clean every 4-6k miles depending on rain
"Something of little or no value" - brings up CGN merch... I love how smart Doddy is throwing shade on roadies this way :D
How much does that service cost?
Thanks
Thnks m8, so when you say if it creaks it could be down to not being fitted correctly......?so wiggle you frelled my press fit bb
When are you revealing the winners fro the park tool kit??
I am on the edge of my seat, wondering when I get MY new tools! ;P
The winners will be announced in the next Tech Show
Do you have any instructional video what how to mainten about bottom bracket fitness bike(Schwinn Ac sport, Peloton bike....)? Please comment.
I got a Di2 kit for my Cervelo P2 but unfortunately it comes with those Press Fit BBright brackets (and I just bought an Ultegra crank which is 24mm). I’m thinking about leaving the Cervélo brand just because of all the headache about loctite, special tools, adapters, and chances of damaging the frame. It seems that a threaded bottom bracket would be much cheaper to service and Shimano does the Ultegra/DuraAce threaded bottom brackets as well.
Haven’t installed the Ultegra Di2 kit yet, and although I bought the bike at a bike shop, I want to do the upgrade myself (or go with a cheaper mechanic).
4:00 A good way to remove stuck cranks is with big Allen key & using your foot, if doing so with stripped frame, you have to put a rubber mat o nthe floor and crank on it and ten stamp on the Allen eky.
if on a complete bike, just hold the bike & crank and stomp on the Allen key.
Hi, I just installed my pressfit BB86 with resing cups (Shimano BB-RS500) for the first time inside my bare carbon shell. Is it normal for the resing cups (or bare carbon) to snap/click loud like this when pressing in ? I was afraid I am damaging something ( I was using a home made press tool) but I ensured that the cups were prefitted parallel to the shell axis. I also lubricated both the cups and the shell with a little bit of waterproof grease. I think that even though the grease has been applied, the cups were sort of 'tension jumping' due to the friction with carbon but I want to make sure that this snapping noise is normal for bare carbon shells. can you advise ?
Who is using a BB press on alloy frame and the cups still won't go in straight, even if pressed one at a time? Bad luck or are those videos just convienient best scenario?
hmmm i'd try a hard wood or plastic dowel rod before going to a large flat head screw driver.... didn't look like you had to whack too hard, but maybe you already had it apart for the vid.
I have a press fit BB and was wondering if there is any bearing press that works both with BBs and hubs. This presses are really expensive and I would really like to have one for both jobs. If you have any suggestions, I would really appreciate them.
I have a Scott Genius 920, and I was wondering if Scott offers a bash guard for the bb/front sprocket, and if so who manufacturers them, and how they installed? Thanks John
Great content and video but the watch is extremely gaudy and distracting, especially when combined with the rubber gloves in a maintenance video.