Two machined aluminum cups thread together keeping the bottom bracket stable in the frame, increasing bearing life, and simplifying maintenance.This means no more creaking, smoother operation, longer bearing life, and really quick bearing replacement.

Specifically designed for installing 24.00mm spindle diameter cranks (Shimano, Etc.) in BB30 (42mm ID BB shell) frames without the need for any adapters.

• Bearings:Enduro ABEC-3
• Color:Black
• Bottom Bracket/Frame Interface:BB30, Specialized Alloy OSBB
• Bottom Bracket Shell Width:68mm – 73mm
• Bottom Bracket Shell I.D.:42mm
• Over Bearing Width: 90.5mm in 68mm wide shell*
• Crank Spindle Diameter:24.00mm
• Tool Pattern:44mm, 16-notch
• Weight:130g