SRAM's GXP Team Bottom Bracket is the external cup interface for any GXP-spindle crankset, and it's what sits between your frame shell and the drive side of every SRAM road or Truvativ mountain crank that uses the Giga X Pipe standard. It's identical to the bottom brackets used in the Force and X0 groups , so if you're replacing a worn unit on a Force 22, Rival 22, Apex, or older Red mechanical crankset, this is the direct swap without stepping up to a boutique replacement.

What separates GXP from a standard 24mm external bottom bracket is the stepped spindle interface. The left side bearing has a smaller diameter to mate with the stepped spindle of the SRAM crank, which allows the inner race of the left side bearing to be captured between the crankarm and the spindle, effectively locating the crank. The right side bearing floats on the spindle, handling only radial loads as you pedal. The result is that the non-drive bearing only sees pedaling load rather than axial preload, which is where the durability claim on this design comes from.

Two threading options exist and they are not interchangeable. The 00.6415.045.000 is English/BSA threading for 68mm or 73mm shells, and the 00.6415.001.000 is Italian threading for 70mm shells. Choose English (1.37"x24tpi - LH/RH) or Italian (M36 x 24tpi - RH/RH) based on what your frame shell is cut for — check your frame spec sheet before ordering, because Italian threaded frames are less common on modern road bikes but still show up on Italian-made steel and older aluminum frames.... Read More