Metric pallet truck rollers are available with Extrathane polyurethane tread and aluminum, steel, or cast-iron wheel centers, with and without ball bearings. Load capacities range from 750-2,425 lb; wheel/roller diameters, from 82-200 mm. With load capacities from 22-540 lb, metric guide rollers with Extrathane tread are available with or without steel wheel centers. Metric forklift tires come with Extrathane polyurethane or elastic solid rubber tread.