How do I know if my bottom bracket is worn out?

Page may contain affiliate links. Please see terms for details.
OP
OP
Mazz

Mazz

Senior Member
Location
Leicester
lots of different sizes and compatibility. Pictured below is a threaded Hollowtech II BB. red is part number , yellow is sizes (thread pitch, axle diameter, and ROAD for BB shell width). You also need a (very cheap) tool to remove and insert.

Some are press-fit, (as opposed to threaded) fitting and removal tools more expensive and probably not a job to attempt if you don't know what you are doing as easy to damage your BB shell.
View attachment 730908

Thanks , I just checked mine and it's just like in your picture (only a bit dirtier):
Driveside SM-BBR60
Non-driveside BC 1.37 x 24 ROAD
 

Attachments

  • IMG_20240515_191730.jpg
    IMG_20240515_191730.jpg
    83.7 KB · Views: 27
  • IMG_20240515_192104.jpg
    IMG_20240515_192104.jpg
    85.2 KB · Views: 28

fossyant

Ride It Like You Stole It!
Location
South Manchester
Oh the horror - look at the state of that bike. :eek:

If you unship the chain, give the cranks a spin. If they spin freely without any crunching or roughness you are OK. I'd have popped the cups out/re-greased the bearings by now, but that's me.:whistle:
 
  • Like
Reactions: C R

Ming the Merciless

There is no mercy
Photo Winner
Location
Inside my skull
Photos proving otherwise, or it hasn’t got mudguards fitted.
 
Top Bottom