SRAM Force Black Box GXP Ceramic Bearing Cups: Left and right bottom bracket bearing cup set for use on Giga X Pipe cranks with integrated GXP spindle: includes plastic seal/spacer-shell with o-rings BlackBox (hybrid-ceramic bearing) with threaded aluminum cups: can also be used to replace/upgrade XR-series GXP systems includes (2) 2.5mm spacers to fit either 68mm or 73mm BB shells Choose: English (1.37"x24tpi - LH/RH) or Italian (M36 x 24tpi - RH/RH) threads. torque 25-30 ft/lbs BB-Cup tool sold separately
