Don't think too much, use 8inch-Swivel-Caster-007 to get your DIY move and manuver around. Diameter of the caster wheel is a metric standard 200mm that is equal to 7.874" inch with imperial units. The thickness of the wheel is 50mm or 1.969" inch. The caster dimensions heightwise is 240mm/9.449" inch. This wheel caster can be mounted using a Top Plate with the dimensions of 100mm x 115mm and holes distance of 75mm x 85mm. Low drag was achieved by a Thermoplastic Rubber core on a Thermoplastic Rubber tire spinning freely with a Double ball beaing. Each caster will carry the load of 661 lb and is Swivel type. The temperature range is -40 to 180 F. Buy the 8inch-Swivel-Caster-007 now, just add the quantity to basket and click on Checkout.