Moves large items quicker using the VXB007075TPR. The wheel diameter is 75mm or 2.953" inch in inches. Dimensions of the caster wheel is 21mm (.827" inch). The Caster with the wheel from end to end is 93mm = 3.661" inch. This wheel caster can be mounted using a Top Plate with the dimensions of 65mm x 54mm and holes distance of 51mm x 38mm. Low drag was achieved by a Thermoplastic Rubber core on a Thermoplastic Rubber tire spinning freely with a Plain bearing. Each caster will carry the load of 121 lb and is Swivel type. The caster temperature range = -40 to 180 F. Very important notice, you need to buy the VXB007075TPR in order to get one :).