The part of your bike that contains the axis the cranks arms spin 'round. (The crank arms are where the pedals attach.)

learn more… | top users | synonyms

1
vote
1answer
185 views

Selecting a compatible BB: spindle offset

Replaced Shimano Bottom Bracket, now front derailleur won't shift to largest gear How do I measure a bottom bracket? I thought the only thing that mattered when replacing a bottom bracket ...
1
vote
1answer
161 views

bottom bracket Stronglight JP400 equivalents

I need to replace my bottom bracket cartridge because it is knackered. After a bit of reading it seems that there may be many types of cartridge variations (axle lengths, threads, size of square ...
1
vote
2answers
2k views

Stationary bike “clicks” when pedaling - crank axle is moving sideways. How can I fix this?

I've got this stationary bike, a York C202, which has developed a problem - namely it "clicks" when pedaling. This is highly annoying, as there's nothing I seem to be able to do about it. I diagnosed ...
0
votes
2answers
407 views

Lower vs. Taller Bottom Bracket Height

The bottom bracket height on some bikes can be adjusted 7.0mm by flipping a "chip" in the shock mount linkage. This also effects head tube angle by 0.5 degrees. Theoretically speaking, What are the ...
0
votes
1answer
263 views

Can't get the drive side bottom bracket cup out

I have an older Raleigh frame that I converted to a fixed gear and the bottom bracket cup on the drive side has been painted over a few times and I can't get it out. This is the type of cup (the one ...
0
votes
1answer
86 views

BB30 bottom bracket won't stop clicking

My mountain bike has a BB30 bottom bracket that was clicking under power. The bike is only a month old, so I figured, break in period, and I took the crank off and greased everything up with teflon ...
0
votes
1answer
139 views

What are the different types of bottom brackets?

Right now I am only familiar with two types of BBs (bottom brackets): The square type on my older mountain bike. The hallowtech (SM-BB70) that comes with a Deore XT crank I bought on my newer bike. ...
0
votes
1answer
38 views

Exchange FSA K-Force Light chainset with a SRAM RED

I'm the lucky owner of a Fuji SST 1.0 from 2010 (mounted with a Shimano press-fit bottom bracket). I would like to exchange the front chainset from a FSA K-force 53/39 to a SRAM RED 50/34. Can you ...
0
votes
1answer
54 views

Triple chainset to single chainset; BB compatability?

I'd like to upgrade the chainset on my GT Avalanche 1.0 2013 so I have no front mech or shifter and just one ring on the front; just 10 gears instead of 30. My current chainset is a Shimano M522 ...
0
votes
1answer
104 views

Will this crankset fit my bottom bracket?

I've got a 2004 Trek 4300 that I need to replace the crankset on. I was able to look up the bottom bracket size here and see that it's a 73x122.5. I'd like to buy this crankset but I'm not exactly ...
0
votes
1answer
121 views

Soft “Thunk” in the crank

I have a one month old Citizen foldable bike and I have noticed a soft "thunk" when turning the crank. It sounds the same whatever gear I am in. It also seems to go away for a short while if I stop ...
0
votes
1answer
151 views

Windsor - The Hour - Bottom Bracket Dimensions

I'm looking to replace the bottom bracket in my Windsor "The Hour" since I'm buying a new crank set for my bike. What are the dimensions for the bottom bracket: both shell width and shaft length? I ...
0
votes
2answers
1k views

New frame bottom bracket and crank compatibility and general stupidity!

I recently bought a Scott CR1 SL 2012 frame to replace a crash damaged frame on my 2009 Boardman Team Carbon road bike. The intention being to move as much as possible across from the old bike on to ...
0
votes
1answer
297 views

screeching noise in bottom bracket

There is a very loud screeching noise when i pedal hard on the down stroke. Be it moving off or climbing up a hill. It is not coming from the front wheel, which i originally thought came from brake ...
0
votes
0answers
21 views

Choosing the correct Bottom Bracket

I have a 2011 Commencal Supreme DHV3 Team edition and I need to replace the bottom bracket. The problem is that I am confused about what the correct model to buy is. The tech book for the bike ...
0
votes
1answer
27 views

Loose pedals on Norco MTB

Just replaced my pedals on a very old Norco MTB. I noticed while working on it that the whole peddle structure is wiggling from side to side is this normal ? I took the plastic caps off the base to ...
0
votes
1answer
43 views

MegaEXO Omega BB and Hollowtech II crank compatibility?

I have a Giant TCX SLR 2 (2014) with a FSA MegaEXO BB and FSA Omega crankset (46/36). I just purchased a Ultegra 6750 crankset (50/34), can I run it on my existing BB? If not, what BB do I need? ...
0
votes
1answer
41 views

Niner Biocnetric Compatibility

Have an older Niner Air 9 Carbon that has the original Biocentric eccentric hub. Does anyone know if the Biocentric II is compatible?
0
votes
2answers
66 views

FSA Omega MegaEXO Press fit BB 19mm removal (non standard BB86)

Has anyone removed a 19mm spindle (Omega) Press fit bottom bracket without destroying it in the process? I have watched http://www.fullspeedahead.tv/video/7006668/installation-of-megaexo-crankset-on ...