Moves large items quicker using the VXB004100TPR1B. The wheel diameter is 100mm or 3.937" inch in inches. Dimensions of the caster wheel is 30mm (1.181" inch). The Caster with the wheel from end to end is 130mm = 5.118" inch. Top Plate is the method of installing the caster to your equipment, here are the dimensions 93mm x 62mm with the holes distance of 73mm x 45mm. The weehl core material is Thermoplastic Rubber and has a Thermoplastic Rubber tire with a low friction Ball bearing. Each caster will carry the load of 198 lb and is Swivel and Upper Brake type. Temperature range is -40 to 180 F. Very important notice, you need to buy the VXB004100TPR1B in order to get one :).