The sram bottom bracket gxp team cups is ideal for all road bikers keeping your pedals insulated and turning smoothly to vastly improve sealing against the elements while reducing seal drag sram uses gutter seal technology the sram bottom bracket gxp team cups uses two bicycle specific cartridge bearings and eight seals ensuring you get a smooth and long lasting ride gxp is different and better other systems rely on side loaded bearings to eliminate play causing bearing wear gxp ca