Little or minimum effort can be possible on your operator by installing VXB004125PVC just ask your operator to push and pull, but not carry. Wheel dia. is 125mm or 4.921" inch in inches. The wheel has a width of 30mm=1.181" inch. The caster dimensions heightwise is 155mm/6.102" inch. Mounted via a Top Plate that has a size of 93mm x 62mm and the holes distance of 73mm x 45mm. The Double ball bearing design will enable the Polyvinyl Chloride tire to roll easily with a core made of Polyvinyl Chloride. Having in mind that every caster wheel has the load capacity of 220 lb with a Swivel type. The caster wheel temperature range = -40 to 180 F. FYI, you will need to buy the VXB004125PVC in order to get one :).