CeramicSpeed Wheel Bearing Upgrade Kit: DT-3 (240 Disc Non-Lefty). CeramicSpeed cartridge bearing kits for wheels is an upgrade option that provides extremely low friction improved power transfer and a service life that far exceeds traditional steel bearings.Grade 3 Silicon Nitride balls
Hardened races
Reinforced polyamide cage and non-contact seals
Hand built in Denmark
High resistance to poor lubrication