Hamilton Caster’s Ultralast wheels are made from new polyurethane materials enabling them to roll more smoothly and easily with loads up to 7,200 pounds. Recommended for continuous duty, power-towed and higher-speed applications on smooth surfaces, the new material minimizes the heat buildup that can cause traditional polyurethane wheels to fail. Target applications include automotive, aerospace, food and beverage manufacturing and military contractors. The new wheels are available in two standard designs. Standard Ultralast has a 3/8th-inch thick tread that is chemically bonded to a heavy-duty, cast iron center. Super Ultralast wheels incorporate a 1-inch tread molded to a super heavy-duty forged steel center. Custom wheel combinations are also available.