Little or minimum effort can be possible on your operator by installing VXB005200BPVC1B1 just ask your operator to push and pull, but not carry. Wheel dia. is 200mm or 7.874" inch in inches. Sizes of the caster wheel is 50mm (1.969" inch). The Caster with the wheel from end to end 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 weehl core material is Polyvinyl Chloride and has a Polyvinyl Chloride tire with a low friction Double ball beaing. Each caster wheel will carry the load of 661 lb and is Swivel type. Ambient temperature range is -40 to 180 F. Buy the VXB005200BPVC1B1 now, we ship on the same day.