0

I broke my chain catcher, so i replaced it. but after assembling everything back on to the bike, i noticed that there's some rattling noises in the bottom bracket. Does that mean that i should buy a new bottom bracket?

  • Grab a crank arm and shake. If you feel looseness then something has worked loose internally (or the bearings are badly worn) and you need to disassemble and rebuild it. – Daniel R Hicks Aug 7 '19 at 1:38
4

Maybe there is a problem with the bottom bracket, maybe you re-assembled something incorrectly, maybe there is something else loose that is rattling.

Check the bike for rattles and loose components by holding it by 10-15cm above the ground and dropping in onto its tires.

Check the bottom bracket is re-assembled correctly.

Turn the cranks by hand. They should feel smooth with no 'notchiness' or roughness. Try to move the crank axle in the bottom bracket shell, there should not be any movement or play.

| improve this answer | |

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.