Imagine your office chair has no wheel caster, you would be carrying it right and left, install 2inch-Lock-Swivel-Caster-022 instead. This caster is rolled on a wheel that has 50mm diameter/1.969" inch inches. The wheel has a width of 50mm=1.969" inch. The Caster with the wheel from end to end is 62mm = 2.441" inch. Top Plate is the method of installing the caster to your equipment, the dimensions are 34mm x 34mm with the holes distance of 129mm x 74mm. The Roller bearing design will enable the Nylon tire to roll easily with a core made of Nylon. Each caster will carry the load of 66 lb and is Swivel and Upper Locking type. Temperature range = -40 to 180 F. Enjoy our 2inch-Lock-Swivel-Caster-022, we wish all the best in your project.