The two machined aluminum cups thread together ensuring the bottom bracket remains 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 22mm / 24mm spindle diameter cranks (SRAM / Truvativ GXP) in BB30A (42mm ID, 73mm wide asymmetrical BB shell) frames without the need for any adapters. Non-Drive Side Bearing: Enduro Angular Contact Drive Side Bearing: Enduro ABEC-3 Color: Black Bottom Bracket/Frame Interface: Cannondale BB30A Bottom Bracket Shell Width: 73mm Bottom Bracket Shell I.D.: 42mm Over Bearing Width: 91mm in 73mm wide shell* Crank Spindle Diameter: 22/24mm Tool Pattern: 44mm x 16 notch Weight: 129g Over Bearing Width Dimensions include supplied silicone dust shields Compatible with the following Bottom Bracket Standards (42mm BB shell inner diameter, 73mm shell width): Cannondale BB30A Compatible with 22/24mm stepped spindle diameter cranksets, like SRAM & Truvativ GXP.