Minimization of possible untoward effects on operator by installing VXB009C250BFSF just ask your operator to push and pull, but not carry. And rolling on wheel that has 250mm diameter/9.843" inch. Dimensions of the caster wheel is 75mm (2.953" inch). The Caster with the wheel from end to end is 320mm = 12.598" inch. Mounted via a Top Plate that has the size of 200mm x 153mm Top Plate: 14mm+housing: 10mm and the holes distance of 160mm x 90mm. Low drag was achieved by a Cast iron polyurethane core on a Cast iron polyurethane tire spinning freely with a Precision double ball bearing. Maximum load calpacity that should not be exceeded on each wheel, remember to add safety factor, when calculating the load capacity 3307 lb with a Fixed type. Temperature range is -40 to 180 F. Buy our VXB009C250BFSF, we wish all the best.