Rubber Tread on Steel Core Wheel 440 lb Load Rating 300 to 999 lb Load Rating Range 3 1/8 in Wheel Dia 1 3/4 in Wheel Width Rubber Wheel/Tread Material Soft 65 Shore A Precision Ball Standard Tread Shape 3/4 in For Axle Size Not Included Includes Spanner Bushing Steel Wheel Core Material Yes Non-Marking 1 13/16 in Hub Length