##Wheels Manufacturing T47 Bottom Bracket Inboard Angular Bearings 24mm Precision made to Wheels Manufacturing’s usual high standards, the T47 Bottom Bracket with Inboard Angular Contact Bearing fits 24mm crank axles as used by Shimano. The machined aluminium cups thread into any T47 bottom bracket shell between 68mm and 132mm wide. They provide a long-lasting, smooth-running interface with a 24mm crank axle, with the quality bearings easy to service or replace when necessary.