Heavy weight capability and Durability made the wheel casters like the VXB009C250BFSF a must use, get your do it yourself object move around from our Toronto biz. Spinning on wheel that has 250mm diameter/9.843" inch. Sizes 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 a 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 could not be exceeded on each wheel, remember to add safety factor, when calculating the load capacity 3307 lb with a Fixed type. The Temperature range is -40 to 180 F. Buy the VXB009C250BFSF now, we ship on the same day.