Little or minimum effort can be possible on your operator by installing VXB20050ALTB-G just ask your operator to push and pull, but not carry. Spinning on wheel that has 50mm diameter/1.969" inch. The thickness of the wheel is 50mm or 1.969" inch. The height of the wheel caster is 257mm = 10.118" inch. This wheel mounting is with the dimensions of 47mm x 47mm and holes distance of 129mm x 74mm. Low drag was achieved by a Acrylonitrile Butadiene Styrene (Plastic) core on a Acrylonitrile Butadiene Styrene (Plastic) tire spinning freely with a Roller bearing. Maximum load calpacity that could not be exceeded on each wheel, remember to add safety factor, when calculating the load capacity 77 lb with a Swivel and Upper Brake type. The Temperature range is -40 to 180 F. Order the VXB20050ALTB-G now, just add the quantity to basket and click on Checkout.