FF-life Luggage Suitcase/Inline Outdoor Skate Replacement Wheels with ABEC 636zz Bearings variety size and choice Brand New Luggage / Inline Skate Replacement Wheels Size:60*18mm/64*18mm/64*24mm/70*24mm/72*24mm/76*24mm/80*24mm/84*24mm Standard Center Bearing ID is 6mm (.236")