So tell me about bottom brackets...

[VeloVT]

I will have to check the specs on the bottom bracket -- i don't know exactly what it is. I know it is an ISIS bracket -- the crankset is FSA (carbon). The other components on my bike are Ultegra... the drivetrain is all still what came stock on the bike, which is a Felt F50. (My first road bike, knew NOTHING when I got it and would have chosen differently if I had known more, but i got a fantastic deal on it).

The movement in the bb is small right now -- I can't reliably reproduce it with my hands when the bike is in the stand (the mechanic, a bit burlier than me, could, however). however I find it quite noticeable when I ride.

EDIT: Deb, according to the Felt website the bb on my bike is an FSA ISIS cartridge bb.

thanks!

[roadfix]

FSA had interface issues in the past between crank arm and bottom bracket....mainly developing some play. Ask your mechanic about this.

[Kitsune06]

Re: bottom brackets:

Mine is squeaking something horriffic, which is driving me nuts because it's *new*.

I expect it's a cartridge. any ideas? I've ridden it in rain but that shouldn't really affect it... =P

[DebW]

Re: bottom brackets:

Mine is squeaking something horriffic, which is driving me nuts because it's *new*.

I expect it's a cartridge. any ideas? I've ridden it in rain but that shouldn't really affect it... =P

If it's new and your LBS installed it, take it back to them and get it checked for free. It shouldn't squeak. Does it squeak when you turn the crank by hand? I'd pull off the crank arms and check the bb independent of the crank. When you put the arms back on, make sure they are installed VERY firmly. Is there movement between the bb and the frame shell (this is easier to test with crank arms on)? You could drip some oil into the spindle/bb interface if that is the origin of the squeak, but a squeak there is probably indicative of faulty tolerances in manufacturing.