This Conversion BB is for installing a Shimano Hollowtech II steel spindle crank in either BB30/PF30 road frame or older Specialized OSBB road frame. This bottom bracket is made of lightweight and durable aluminum with long lasting sealed cartridge bearings.
- New updated design with Rubber expanding collet.
- This version for Shimano™ Hollowtech II steel spindle road cranks only.
- Designed precisely to Shimano bearing stance & chain line spec.
- Forged & machined heat-treated 7075 T6 Aluminum
- For 68MM BB30/PF30 and older Specialized OSBB Road frames
- Not for BBRight, BB386EVO, BB30A, BB86, BB92 frames
- Steel version:Enduro 2437
- Ceramic Version:Enduro 2437 Angular contact, Grade5 balls, ABEC5 Assembly
- 68mm version cannot be used for MTB Cranks