Imagine your office chair has no wheel caster, you would be carrying it right and left, install 5inch-Lock-Swivel-Caster-010 instead. This caster is rolled on a wheel that has 125mm diameter/4.921" inch inches. The thickness of the wheel is 50mm or 1.969" inch. The Caster with the wheel from end to end is 175mm = 6.890" inch. Top Plate is the method of installing the caster to your equipment, the 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. Here come the maximum load that should be applied on every wheel, remember to add safety factor, when calculating the load capacity 838 lb with a Swivel and Upper Locking type. Last and not least the temperature range = -40 to 180 F. Enjoy our 5inch-Lock-Swivel-Caster-010, we wish all the best in your project.