Heavy weight capability and Durability made the wheel casters like the VXB20050BPP2 a must use, get your do it yourself object move around from our Toronto biz. Dia. Measured of the caster wheel in metric standard 50mm which is equal to 1.969" inch with imperial units. The thickness of the wheel is 50mm or 1.969" inch. The Caster with the wheel from end to end is 60mm = 2.362" inch. This wheel mounting is Top Plate with the dimensions of 38mm x 38mm and holes distance of 129mm x 74mm. The Roller bearing design will enable the Polypropylene tire to roll easily with a core made of Polypropylene. 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 type. The Temperature range is -40 to 180 F. Buy the VXB20050BPP2 now, we ship on the same day.