Halifax or Vancouver our Low priced answert to the heavy weight objects movement, Wheel casters like our VXB004075BTPRF will be rolling your machine or equipment back and forth. Wheel dia. is 75mm or 2.953" inch in inches. The thickness of the wheel is 30mm or 1.181" inch. The Caster with the wheel from end to end is 105mm = 4.134" inch. Top Plate is the method of installing the caster to your equipment, dimensions are 93mm x 62mm with the holes distance of 45mm x 72mm. The Double ball bearing design will enable the Thermoplastic Rubber tire to roll easily with a core made of Thermoplastic Rubber. Maximum load calpacity that could not be exceeded on each wheel, remember to add safety factor, when calculating the load capacity 176 lb with a Rigid type. Ambient temperature range is -40 to 180 F. FYI, you will need to buy the VXB004075BTPRF in order to get one :).