Little or minimum effort can be possible on your operator by installing VXB005C125CPUB3 just ask your operator to push and pull, but not carry. Spinning on wheel that has 125mm diameter/4.921" inch. The wheel has a width of 50mm=1.969" inch. The Caster with the wheel from end to end is 175mm = 6.890" inch. Mounted via a Top Plate that has a size of 115mm x 100mm x 6mm and the holes distance of 72mm x 85mm. This caster wheel core made of Cast Iron and Polyurethane and has a Cast Iron and Polyurethane tire spinning over Roller bearing. Each caster wheel will carry the load of 838 lb and is Swivel and Upper Brake type. The Temperature range is -40 to 180 F. FYI, you will need to buy the VXB005C125CPUB3 in order to get one :).