Shimano SM-BB52 Hollowtech II bottom bracket in the 68 / 73 mm version for cranksets with 24 mm integrated bearing axis.
- Genuine Shimano HollowTech II bottom bracket assembly
- Set includes left and right hand cups, spacers, inner cover, and inner O-rings
- Sealed cups keep out dirt and water
- Maintenance free
- Compatible with 68 mm and 73 mm shell
- Durable anodised finish
- Easy installation