Caster Barn offers the top three selling Polyurethane on Aluminum Wheels in the Caster Industry. We have the famous Orange Poly on Aluminum Wheel that is commonly seen on Carts in the Manufacturing and Automotive Plants. We offer a new Yellow Polyurethane on Aluminum Wheel Manufactured by Durable USA known as the UltraFlex wheel, manufactured and tested for the best push/pull ergonomics in the Caster Industry. Last but not least is our standard Poly on Aluminum in either red or a green polyurethane tread color. Both our orange poly wheels and our yellow poly wheels are crowned with large 6204 precision bearings for easy push/pull factors.