Little or minimum effort can be possible on your operator by installing VXB005C200CPUB2 just ask your operator to push and pull, but not carry. Spinning on wheel that has 200mm diameter/7.874" inch. Sizes of the caster wheel is 50mm (1.969" inch). The Caster with the wheel from end to end is 250mm = 9.843" inch. Mounted via a Top Plate that has a size of 115mm x 100mm x 6mm and 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. Maximum load calpacity that could not be exceeded on each wheel, remember to add safety factor, when calculating the load capacity 1190 lb with a Swivel and Upper Brake type. Ambient temperature range is -40 to 180 F. Buy the VXB005C200CPUB2 now, we ship on the same day.