This Conversion BB is for installing a Shimano Hollowtech II steel spindle crank in either BB30 or PF30 MTN frame. This bottom bracket is made of lightweight and durable aluminum with long lasting sealed cartridge bearings.

[SPECIFICATIONS]

• New updated design with Rubber expanding collet
• This version for Shimano™ Hollowtech II steel spindle cranks only
• Designed precisely to Shimano bearing stance & chain line spec
• Forged & machined heat-treated 7075 T6 Aluminum
• For 73mm BB30 or PF30 mountain frames
• Not for BBRight, BB386EVO, BB86, BB92 frames
• Steel version: Enduro2437
• Ceramic Version: Enduro2437 Angular contact, Grade5 balls, ABEC5
• 68mm MTB frames shells not supported by this BB.
• MTB Guides-ISCG05 Good, ST Mounted Good, ISCG03 Not Good
• Use two 16-notch BB tools for correct installation/removal. See instructions

[TECHNOLOGY]

• Updated Rubber expanding Collet design | Patented Pending
• “Rubber Collet” drive cup expansion for wiggle-free press
• Non-Drive O-Ring compensates for frame width discrepancies