Specifically designed for Aero 15” beadlock wheels Inside diameter measures 12.75" and the O.D. is 16.38" Ring is CNC laser cut out of high grade steel to ensure a proper fit Weighs only 3-1/4 lbs. and is available in black, chrome, silver, or yellow They are ribbed to bite to the tire and incorporate 32 bolt holes so rotation of bolts can help wear and tear Aero Race Wheels 54-500004 Wheels