This is a replacement Shimano bottom bracket. It is easy to install. The oversized axle with eight splines provides a more rigid interface between the crank arm and bottom bracket.
Key Features:
- Fits Shimano FC-M751, FC-M571, FC-M510-8 and FC-M440-8 cranksets
- English (BSA) thread 1.37x24
- Octalink splined drive
- 73mm shell
- Axel length of 113mm
- Weighs 272g