Bottom Brackets

•This version for Shimano™ Hollowtech cranks only. •Forged & machined heat-treated 7075 T6 Aluminum •Steel radial bearing or Ceramic Angular option •68mm Road version / 73mm MTB Version •For BB30, PF30, and Specialized Road OSBB frames •CERAMIC Option:Angular contact steel race, ABEC5 Assembly, Grade5 Ceramic balls

Designed to be a proper BB for installing SRAM GXP/ISIS2 cranks in either BB30 or PF30 mountain frames. This includes cranks from SRAM/TRUVATIV/QUARQ, and Oval Concepts. Our patent pending design keeps the cartridge bearings outboard of the frame right on SRAM spec for greater rigidity and free of frame/c-clip tolerance issues that other systems deal with. Simply press in the longer non-drive-cup, then the shorter drive cup threads into it. As the drive cup threads in, our trademark Collet system expands to a precise limit evenly dispersing pressure for a super tight fit. With both cups connected and our collet set exactly to spec, there is no chance the bearings can come out of alignment or wiggle/walk out of the frame. This design also uses a compressible o-ring on the non-drive side cup to compensate for frame shell width discrepancies. SRAM BB30/PF30 conversion bottom bracket Forged & machined heat-treated 7075 T6 Aluminum Enduro 2437 Drive /2237ER Non-Drive steel bearings For 73mm BB30 or PF30 mountain frames Not for BBRight,BB386EVO, BB86, BB92 frames SRAM: GXP SRAM/Truvativ/Quarq/ISIS2 steel spindle, and also Oval Concepts 400/500/700series cranks Made with Enduro bearings and high grade grease Model: SRAM mountain Press tool, and 2 Praxis M30 BB tools required for installation Interface: 24/22mm stepped spindle Shell: BB30/PF30 (includes sleeve for BB30 installation) Width: 73mm Color: black