Single-Flange Track Wheel 3000 lb Load Rating 3000 to 5999 lb 4 1/2 in Wheel Dia 1 5/8 in Wheel Width Steel Wheel/Tread Material Extra Hard Wheel/Tread Hardness Rating 188 BHN Wheel/Tread Hardness Roller Wheel Bearing Type Single Flange Tread Shape For Axle Size 1 in Not Included Includes Spanner Bushing Steel Wheel Core Material Yes Non-Marking 3 1/4 in Hub Length