Wheels Manufacturing Shimano BB30 Thread Together Outboard Angular Contact Bottom Bracket 68 or 73mm x No axle Black Default:Default Ultra Smooth Bearings (USB): Ceramic

Ultra Smooth Bearings (USB): Ceramic cup-and-cone system reduces friction up to 50% versus standard bearings

W/M AQ-1000

Spinner Material: Anodized aluminum

Non-retail / zero packaging

Wheels Manufacturing Shimano BB30 Thread Together Outboard Angular Contact Bottom Bracket 68 or 73mm x No axle Black Default:Default Ultra Smooth Bearings (USB): CeramicBB Wheels Manufacturing Shimano BB30 Thrd Together Out AC BK Top notch bottom bracket No more creaking, smoother operation, longer bearing life, and really quick bearing replacement. 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