SRAM BB30 Bottom Bracket Assembly
It's hard to argue with lighter, stiffer, smoother ... the BB30 concept is a good one. If you plan on running a SRAM drivetrain on one of the many progressive frame designs with this oversized standard, you'll need the BB30 Bottom Bracket Assembly. The kit comes with two sets of steel bearings and mounting hardware for SRAM cranks and bikes with a BB30 bottom bracket shell.