FEATURES: For SRAM/Truvativ/Quarq GXP/ISIS2 steel spindle cranks only Forged & machined heat-treated 7075 T6 Aluminum Enduro 2437 Drive /2237ER Non-Drive steel bearings For 68mm BB30 or PF30 Road frames Not for BB30a, BBRight, BB386EVO, BB86, BB92 frames Press tools, and 2 Praxis M30 BB tools are required for installation and are not included. SPECS: Interface: GXP Spindle Shell: BB30/PF30 (includes sleeve for BB30 installation) Width: 68mm Color: Black