Utilizing VXB005125PVCB1 makes it feasible to pull and push items instead of transport The wheel diameter is 125mm or 4.921" inch in inches. Dimensions of the caster wheel is 50mm (1.969" inch). The Caster with the wheel from end to end is 166mm = 6.535" inch. This wheel caster can be mounted using a Top Plate with the dimensions of 100mm x 115mm and holes distance of 75mm x 85mm. Low drag was achieved by a Polyvinyl Chloride core on a Polyvinyl Chloride tire spinning freely with a Double ball beaing. Maximum load calpacity that should not be exceeded on each wheel, remember to add safety factor, when calculating the load capacity 507 lb with a Swivel type. Environment temperature range is -40 to 180 F. Very important notice, you need to buy the VXB005125PVCB1 in order to get one :).