Efficient VXB005C125BAPU makes it feasible to pull and push items instead of transport Wheel dia. is 125mm or 4.921" inch in inches. Sizes of the caster wheel is 50mm (1.969" inch). The Caster with the wheel from end to end is 175mm = 6.890" inch. This wheel mounting is Top Plate with the dimensions of 115mm x 100mm x 6mm and holes distance of 72mm x 85mm. The Double ball beaing design will enable the Aluminium and Polyurethane tire to roll easily with a core made of Aluminium and Polyurethane. Each caster wheel will carry the load of 926 lb and is Swivel type. The caster wheel temperature range = -40 to 180 F. FYI, you will need to buy the VXB005C125BAPU in order to get one :).