Single-Flange Track Wheel 1540 lb Load Rating 1000 to 2999 lb 3 in Wheel Dia 1 5/8 in Wheel Width Iron Wheel/Tread Material Extra Hard Wheel/Tread Hardness Rating 190-230 BHN Wheel/Tread Hardness Precision Ball Wheel Bearing Type Single Flange Tread Shape For Axle Size 3/4 in 3/8 in Groove Width Not Included Includes Spanner Bushing Iron Wheel Core Material Yes Non-Marking 1 7/8 in Hub Length