CeramicSpeed Wheel Bearing Upgrade Kit: Zipp-9 (NSW Hubsets). 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
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