Polyurethane Tread on Aluminum Core Wheel 750 lb Load Rating 300 to 999 lb Load Rating Range 5 in Wheel Dia 2 in Wheel Width Polyurethane Wheel/Tread Material Firm 90 Shore A Precision Ball Donut Tread Shape 1/2 in For Axle Size Not Included Includes Spanner Bushing Aluminum Wheel Core Material Yes Non-Marking 2 15/32 in Hub Length