Little or minimum effort can be possible on your operator by installing VXB005200ATPRB1 just ask your operator to push and pull, but not carry. Wheel dia. is 200mm or 7.874" inch in inches. The thickness of the wheel is 50mm or 1.969" inch. The height of the wheel caster is 240mm = 9.449" inch. Mounted via a Top Plate that has a size of 100mm x 115mm and the holes distance of 75mm x 85mm. The Double ball beaing design will enable the Polypropylene core and Thermoplastic Rubber tire to roll easily with a core made of Polypropylene core and Thermoplastic Rubber. Having in mind that every caster wheel has the load capacity of 661 lb with a Swivel and Center Brake type. Ambient temperature range is -40 to 180 F. FYI, you will need to buy the VXB005200ATPRB1 in order to get one :).