Chrome plated steel rims Polished stainless steel spokes Chrome plated hubs that are CNC machined from billet aluminum Spun steel design of the drop center type rim eliminates the butt weld joint found on lesser quality rims Spoke nipple sealing process permits use of tubeless type tire 1" O.D. sealed ball bearing 11-1/2" bearing-to-bearing Features dual bearings on the drive side for improved axle stability Requires 2000-Later brake disc and pulley/sprocket Fits custom wide frame with right side drive and right side brake