Polyurethane Tread on Steel Core Wheel for Pallet Jacks 1 675 lb Load Rating 1 000 to 2 999 lb Load Rating Range 3 11/32 in Wheel Dia 4 in Wheel Width Polyurethane Wheel/Tread Material Firm 92 Shore A Precision Ball Standard Tread Shape 11/16 in For Axle Size Not Included Includes Spanner Bushing Steel Wheel Core Material Yes Non-Marking 4 31/64 in Hub Length