V-Groove Track Wheel 880 lb Load Rating 300 to 999 lb 5 7/8 in Wheel Dia 1 3/8 in Wheel Width Nylon Wheel/Tread Material Hard Wheel/Tread Hardness Rating 80 Shore D Wheel/Tread Hardness Precision Ball Wheel Bearing Type V-Groove Tread Shape For Axle Size 3/4 in 1 in Groove Width Not Included Includes Spanner Bushing Nylon Wheel Core Material Yes Non-Marking 1 5/16 in Hub Length