Specifically designed for installing 24mm spindle Shimano cranks in BB30 (42mm ID BB shell) frames without the need for any adapters. Two machined aluminum cups thread together keeping the bottom bracket stable in the frame, increasing bearing life, and simplifying maintenance.

Product details

1. BB30 Thread Together Outboard BB for 24mm spindle Shimano cranks
2. Machined aluminum cups thread together so the bottom bracket remains stable in the frame
3. Enduro ABEC-3 bearings and silicone dust seals
4. Tool Pattern: 44mm, 16-notch
5. Made in USA