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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