Hamilton's new "Speed" Product offering features Hamilton's new TerraTech™ wheels with press-on tires designed for applications moving heavy loads at speeds up to 10 mph. The Spinfinity® top plates and inner raceways are forged steel formed from one piece, providing a superior raceway for shock conditions. This new series offers (5) different TerraTech™ compounds to cover a wide spectrum of industrial environments. The heavy duty wheels are mounted in enhanced caster rigs that features a sealed swivel raceway for maintenance-free operation. Engineers also enhanced the caster series with larger axles and massive double stacked precision ball bearings in the wheels to accommodate the higher speeds. To help with wheel selection, the Black rubber will provide the most cushion and is best suited for outdoors but has much lower capacity compared to the poly offerings. The white rubber grants similar benefits to the black and provides the added benefit of being non-making so it's best suited for indoor use. Among the (3) polyurethane choices, select the standard TerraTech™ (red tread) for general purpose indoor use with the occasional outdoor use. For very rough floors with coarse debris or super-tough terrain such as gravel, the TerraTech™ MAX (yellow tread color) is your best choice because its tread has the highest tear resistance. If the application is primarily outdoors or requires continuous-duty (24/7) use at high speeds, the TerraTech™ ULTRA (natural tread color) will be your best choice.