Hub part ceramicspeed aeolus upgrade kit coated

High-quality replacement ceramic bearings for Bontrager Aeolus XXX and Aeolus D3 wheels; Compatible with Bontrager rim brake wheels with DT Swiss hub only; CeramicSpeed bearings reduce friction and improve performance and durability; Are 400% smoother , 128% stronger and 58% lighter than conventional steel bearings; Made with silicone nitrate level 3, the highest level; 75% stronger bearing race that reduces friction and wear; Manufactured to hand in Denmark and used by numerous professional teams, including Trek Factory Racing;