Heavy weight capability and Durability made the wheel casters like the VXB007040PB1 a must use, get your do it yourself object move around. The wheel diameter is 40mm or 1.575" inch in inches. The wheel has a width of 17mm=.669" inch. The Caster with the wheel from end to end is 54mm = 2.126" inch. Top Plate is the method of installing the caster to your equipment, here are the dimensions 45mm x 40mm with the holes distance of 35mm x 28.5mm. Low drag was achieved by a Plastic core on a Plastic tire spinning freely with a -. Each caster will carry the load of 44 lb and is Swivel and Center Brake type. Temperature range is -40 to 180 F. Buy our VXB007040PB1, we wish all the best.