Wheels Manufacturing T47 Bottom Bracket OEAn Exceptional Bottom Bracket The bottom bracket is the part that connects your crankset to your frame so you can smoothly pedal on all your rides. With a high-quality bottom bracket, you'll have smoother pedaling for many miles. The Wheels Manufacturing T47 Bottom Bracket has machined aluminum cups that thread together directly into a T47 BB shell. Bearings are easily serviced or replaced. It includes a sleeve to fit between cups for added protection from dirt and grime and also keeps your internal wires and hoses from rubbing on the crank spindle. Features Designed for T47 frames Machined aluminum cups that thread together directly into the frame Includes a sleeve to fit between the cups for added protection from dirt and grime | Wheels Manufacturing T-47 Bb | Black | Shimano, Outboard