Smooth and reliable Unlike other external bottom bracket systems the SRAM GXP system captures the non-drive side bearing allowing it to float on the spindle itself rather than pre-loading and essentially sideloading the bearing which increases friction and reduces bearing life. With the GXP system, there is no guessing with how much preload is needed - it sits right every time. 8 seals all round reduce dirt contaimation and a new sealing system SRAM calls "gutter seal" reduces friction by up to 35%. Stainless steel bearings can be serviced by simply removing the seals, no special tools required. Fits BSA threaded frames Will fit into a SRAM PF30 to BSA adapter - If you have a PF30 frame and need to reuse a GXP crank system Includes spacers to suit 68 and 73mm BB widths
