Specifically designed for installing 22mm / 24mm spindle diameter cranks (SRAM / Truvativ GXP) in Cannondale PF30A (46mm ID, 73mm wide asymmetrical BB shell) frames without the need for any adapters The two machined aluminum cups thread together ensuring the bottom bracket remains stable in the frame, increasing bearing life, and simplifying maintenance Enduro ABEC-3 bearings 73mm PF30A Sram GXP 24/22mm Alloy 168g BlackUPC/EAN/GTIN: 811079024763