6" x 2" Ergolastomer Wheel - 1700 lbs. Capacity6" x 2" Ergolastomer Wheel The Ergolastomer wheel is our toughest wheel that can provide some cushion for heavy duty applications. These casters excel in harsh conditions, like rolling on asphalt. They are washable, chemical resistant, provide extreme impact strength, and will not produce flat spots. Tread: Solid Cast Polyurethane Elastomer, Non Marking Core: Glass filled Nylon Bearing Collar Bearing: 1 2" ID Precision Ball Bearing Capacity: 1,700