The Kogel PF30 Shallow Bottom Bracket keeps you riding smooth and comfortable. The shallow version is a perfect choice for metal frames and frames internal cables and those with reduced contact area in the bottom bracket shell. A wider and stiffer setup greatly reduces bearing wear. Featuring ceramic bearings, this bottom bracket is made to run like new for years on end while enhancing your power transfer. This version is designed to accommodate most 24mm crank spindles on a PF30 frame and includes a GXP reducer for SRAM. These strong seals are designed for MTB and gravel riders to keep moisture and debris out. Kogel knows that every pedal stroke is important, and hand makes their bottom brackets to maximize your efficiency.