Nylon Tread Wheel 6 600 lb Load Rating 6 000 lb and Greater Load Rating Range 5 7/8 in Wheel Dia 3 1/8 in Wheel Width Nylon Wheel/Tread Material Hard 80 Shore D Precision Ball Standard Tread Shape 1 3/8 in For Axle Size Not Included Includes Spanner Bushing Nylon Wheel Core Material Yes Non-Marking 3 1/2 in Hub Length