learn to take the bottom bracket apart and see if it’s [adjustable](https://www.parktool.com/en-us/blog/repair-help/bottom-bracket-service-adjustable-cup-and-cone). the lack of a lock ring on the left side tells me that it’s probably not adjustable, but the only way to be certain is to open it up. most of the time, replacing any old BB with a cartridge unit is cheap and much, much easier than dealing with finicky adjustable ones.
cowbythestream on
Also, see if there is a “nearby” bike coop. Tools and experience are available. An independent bicycle shop is also worth patronizing,
FarAwaySailor on
In addition to Allen keys and spanners, you will need specialist tools:
Crank puller
Bottom bracket tool
GenericName187 on
You need a new cartridge bottom bracket.
You would need to remove the crank bolts, use a crank puller to remove the crank arm. Then use a 20 spline bottom bracket tool to remove the bottom bracket. The new bottom bracket would have to have the same shell width (68 mm or 73 mm) and spindle length (something like 122 mm). This information is often printed on the cartridge bottom bracket itself when you remove it.
2024Noname on
Needs a new bearing (and some regular servicing and cleaning).
Don’t ride with that until repaired; it will damage your knee
7 Comments
Bottom bracket is cooked. Time to replace it.
learn to take the bottom bracket apart and see if it’s [adjustable](https://www.parktool.com/en-us/blog/repair-help/bottom-bracket-service-adjustable-cup-and-cone). the lack of a lock ring on the left side tells me that it’s probably not adjustable, but the only way to be certain is to open it up. most of the time, replacing any old BB with a cartridge unit is cheap and much, much easier than dealing with finicky adjustable ones.
Also, see if there is a “nearby” bike coop. Tools and experience are available. An independent bicycle shop is also worth patronizing,
In addition to Allen keys and spanners, you will need specialist tools:
Crank puller
Bottom bracket tool
You need a new cartridge bottom bracket.
You would need to remove the crank bolts, use a crank puller to remove the crank arm. Then use a 20 spline bottom bracket tool to remove the bottom bracket. The new bottom bracket would have to have the same shell width (68 mm or 73 mm) and spindle length (something like 122 mm). This information is often printed on the cartridge bottom bracket itself when you remove it.
Needs a new bearing (and some regular servicing and cleaning).
Don’t ride with that until repaired; it will damage your knee
Buy a new cartridge BB.