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 Specialized Road frames
Not for BBRight,BB386EVO, BB86, BB92 frames
Steel version: Enduro 2437
Ceramic Version: Enduro 2437 Angular contact, Grade5 Ceramic balls, ABEC5 Assembly
68mm version cannot be used for MTB Cranks
ConvBB OSBB Shimano
Bearing: Non-Ceramic, Ceramic
For specialized road bike only