Who said Canada do not sell caster wheel, eh? The VXB20050NYS1B can move your large heavy object. Wheel dia. is 50mm or 1.969" inch in inches. The wheel has a width of 50mm=1.969" inch. The caster dimensions heightwise is 48mm/1.890" inch. This wheel mounting is with the dimensions of 34mm x 34mm and holes distance of 129mm x 74mm. Low drag was achieved by a Nylon core on a Nylon 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 66 lb with a Swivel and Upper Brake type. The caster wheel temperature range = -40 to 180 F. Buy the VXB20050NYS1B now, we ship on the same day.