It combines the durability of hard tread wheels with features of softer tread products which allow the wheel to both resist and cushion impacts and also glide quietly while protecting surfaces. The tread material is chemically bonded to an ultra-tough, waffle design polyolefin wheel core for a hardy, non-marking ride. The new HD model is constructed with a thermoplastic elastomer (TPE) tread, but with a much harder durometer. The TPE material resists water damage associated with hydrolysis from wet and punishing applications. The new Trans-forma HD wheel is available in 4”, 5” and 6” diameters, each with a 2” tread width. The HD models have capacity ratings from 600 to 900 pounds, depending upon the wheel diameter.