Made from solid billet 6061-T6 aircraft grade material. Molded with a polyurethane material that won't dent or give like a rubber wheel can. Over a 10,000 lbs/ft. load capacity. 4" O.D., 3/8" through hole for mounting. Track tested over 4 years & run on vehicles making over 1500HP.
Mounts using a 3/8" shoulder bolt (not included)