V-Groove Track Wheel 800 lb Load Rating 300 to 999 lb 4 in Wheel Dia 2 in Wheel Width Iron Wheel/Tread Material Extra Hard Wheel/Tread Hardness Rating 180-220 BHN Wheel/Tread Hardness Roller Wheel Bearing Type V-Groove Tread Shape For Axle Size 3/4 in Not Included Includes Spanner Bushing Plastic Wheel Core Material Yes Non-Marking 2 3/16 in Hub Length