CeramicSpeed Threadfit T47a

This unit is specifically designed for 29mm spindles, making it compatible with SRAM DUB cranksets. Please verify your crank spindle diameter before purchasing to ensure a proper fit.

T47a is an asymmetric threaded bottom bracket standard. It combines the reliability of a threaded interface with the stiffness of a wider shell, typically found on newer road and gravel frames.

While the unit has been previously used, the ceramic bearings have been inspected to ensure they remain smooth and functional. You can expect the same low-friction efficiency that CeramicSpeed is known for, without the premium price of a brand-new unit.

Yes, you will need a specific T47 bottom bracket tool that matches the external notches on the cups. Because T47a is a threaded standard, installation is straightforward, but using the correct tool is essential to avoid damaging the cups.

Ceramic bearings are significantly harder and rounder than steel, which reduces friction and rolling resistance. This translates to a smoother pedal stroke and potentially more efficient power transfer during long rides.