Martin wheel 8″ heavy duty wheel zp182rt-2c2 – 8×2.50 – 2-1/4″ x 5/8-inch centered hub – rib tread made in the u.s.a!! this wheel is designed to be a quality, long-lasting product to provide you with the greatest amount of performance and satisfaction at a great value. This heavy duty recycled rubber tire is mounted on a poly wheel with an industrial steel ball bearing hub. Complete tire and wheel assembly. Hub length: 2-1/4 inch centered | bore: 5/8-inch ball bearing. Solid rubber construction. 450 lbs. Load capacity.