Mounting VXB20050ALT1-S is the Low cost solution of making a project to move around by pushing or pulling. Diameter size of the caster wheel has a 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 257mm = 10.118" inch. is the method of installing the caster to your equipment, here are the dimensions 47mm x 47mm with the 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. Bearing in mind that every caster wheel has the load capacity of 77 lb with a Swivel type. Environment temperature range is -40 to 180 F. Buy our VXB20050ALT1-S, we wish all the best.