V-Groove Track Wheel 6500 lb Load Rating 6000 lb and Greater 8 in Wheel Dia 4 in Wheel Width Steel Wheel/Tread Material Extra Hard Wheel/Tread Hardness Rating 179 BHN Wheel/Tread Hardness Roller Wheel Bearing Type V-Groove Tread Shape For Axle Size 1 1/4 in 1 3/4 in Groove Width Included Includes Spanner Bushing Steel Wheel Core Material Yes Non-Marking 4 1/2 in Hub Length