Airkoul Forwardsell Black Luggage Suitcase/Inline Outdoor Skate Replacement Wheels with ABEC 608zz Bearings Brand New And High Quality Luggage / Inline Skate Replacement Wheels Size:40*18mm/45*19mm/50*18mm/55*18mm/60*18mm/64*24mm/68*24mm/70*23mm/75*23mm/80*24mm(As Picture See) Standard Center Bearing ID is 7mm (.275) Each wheel size is sold as a SET of (2) Wheels. You're bidding on one set of (2) wheels ONLY Please always check the size table for the wheel dimension, bearing dimension and axle dimension before make any order.