Little or minimum effort can be possible on your operator by installing VXB005C100CPUB3 just ask your operator to push and pull, but not carry. Wheel dia. is 100mm or 3.937" inch in inches. The wheel has a width of 50mm=1.969" inch. The caster dimensions heightwise is 150mm/5.906" inch. Top Plate is the method of installing the caster to your equipment, dimensions are 115mm x 100mm x 6mm with the holes distance of 72mm x 85mm. Low drag was achieved by a Cast Iron and Polyurethane core on a Cast Iron and Polyurethane tire spinning freely with a Roller bearing. Each caster wheel will carry the load of 661 lb and is Swivel and Upper Brake type. The Temperature range is -40 to 180 F. FYI, you will need to buy the VXB005C100CPUB3 in order to get one :).