Wheels MFG BB30 Outboard ABEC-3 Bottom Bracket for Shimano BF PSI The Ultra 410 features a

The Ultra 410 features a 12mm double-bolting temper hardened steel shackle providing protection against cutting and torsion attacks in a simple design

Armed against pinch flats with the patent pending Wide Hookless Bead

The signature Feedback Sports Red Anodized Aluminum body is lightweight and strong and can be used just as you would any 2-way ratchet

Super Race (Souplesse) carcass for an incredibly supple ride

Wheels MFG BB30 Outboard ABEC-3 Bottom Bracket for Shimano BF PSI The Ultra 410 features aTwo 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. Specifications Bearings: Enduro ABEC 3 Color: