Heat-Resistant Steel Tread Wheel 5 000 lb Load Rating 3 000 to 5 999 lb Load Rating Range 6 in Wheel Dia 3 in Wheel Width Steel Wheel/Tread Material Extra Hard 179 BHN Precision Ball Standard Tread Shape 1 1/4 in For Axle Size Included Includes Spanner Bushing Forged Steel Wheel Core Material No Non-Marking 3 1/2 in Hub Length