A centred pneumatic black wheel with a 3-inch width x 12-inch diameter, a 3/4 inch bore, ball bearing, and a durometer rating of 80A. The Duraflex solid cushion tire is a blend of granular rubber & chemical accelerators, mounted on a polypropylene centre, and cured under pressure. The load rating is 600 lbs, and it is puncture-proof and impact-resistant.