Bicycle specific cartridge bearing, covering virtually all headsets in the market.Features:Specification and quality matches original bearings selected by the engineers at the world's leading bike brandsNylon retainer, CrMo races, CrMo (HRC 61-66) ball bearingsTolerance ABEC-3Rubber LLU (full contact) SealsMultemp SRL (Kyodo Yushi) Grease
