Enduro Zero Ceramic Grade 3 6902 Sealed Cartridge Bearing 15 x 28 x 7mm

Zero Ceramic bearings are the ultimate race day weapon. Oversized Grade 3 balls roll on races which are ground to a mirror finish after receiving Magnetite and then Cryogenic treatments for hardness and longevity and slippery Silicone seals to produce minimum resistance.All measurements are in millimetersABEC 5 precision cartridge bearingCERBEC USA Grade 3 Si3n4 Silicon Nitride balls52100 high carbon Chromium alloy racesRaces receive 3 cryogenic treatments and a rust proof Magnetite finish"VV" type 2-lip non-contact Silicone labyrinth sealsNylon/graphite retainer