* Will not rust, and lasts 5 times longer than common ceramic bearings* Complete bottom bracket for BB90 frames* XD-15 angular contact hybrid ceramic bearings* Nitrogen steel races with grade 3 silicon nitride balls
* Will not rust, and lasts 5 times longer than common ceramic bearings* Complete bottom bracket for BB90 frames* XD-15 angular contact hybrid ceramic bearings* Nitrogen steel races with grade 3 silicon nitride balls