Utilizing VXB20050CPU2 makes it feasible to pull and push items instead of transport The wheel diameter is 50mm or 1.969" inch in inches. Dimensions of the caster wheel is 50mm (1.969" inch). Overall height of the wheel caster is 48mm = 1.890" inch. Mounted via a Top Plate that has the size of 38mm x 38mm and the holes distance of 129mm x 74mm. Low drag was achieved by a Nylon and Polyvinyl Chloride core on a Nylon and Polyvinyl Chloride tire spinning freely with a Roller bearing. Maximum load calpacity that should not be exceeded on each wheel, remember to add safety factor, when calculating the load capacity 55 lb with a Swivel and Upper Brake type. Temperature range is -40 to 180 F. Buy our VXB20050CPU2, we wish all the best.