The sram bottom bracket bb30 pressfit 30 7983mm combines the best from both bb30 and pressfit bottom brackets to make one captivating package this sram bottom bracket features an integrated seal pre assembled into the cups to ensure the bearing life is prolonged the bearings are housed in nylon cups which can be pressed into the frames bottom bracket shell sram bottom bracket bb30 pressfit 30 7983mm features bearings ceramic or standard material alloy integrated seal pre assemb