Imagine your office chair has no wheel caster, you would be carrying it right and left, install 63mm-Lock-Swivel-Caster-001 instead. Diameter of the caster wheel is a metric standard 63mm that is equal to 2.480" inch with imperial units. The wheel has a width of 63mm=2.480" inch. The overall height of the caster is 90mm or 3.543" inch. is the method of installing the caster to your equipment, the dimensions are 92mm x 65mm with the holes distance of 73mm x 45mm. Low drag was achieved by a Polyvinyl Chloride core on a Polyurethane tire spinning freely with a Ball bearing. Bearing in mind that every caster wheel has the load capacity of 88 lb with a Swivel and Upper Locking type. Last and not least the temperature range = -40 to 180 F. Remember, you will have to buy the 63mm-Lock-Swivel-Caster-001 in order to have it :).