Minimization of possible untoward effects on operator by installing VXB007075PF just ask your operator to push and pull, but not carry. The wheel diameter is 75mm or 2.953" inch in inches. The wheel has a width of 21mm=.827" inch. The caster dimensions heightwise is 93mm/3.661" inch. Mounted via a Top Plate that has the size of 65mm x 54mm and the holes distance of 51mm x 38mm. Low drag was achieved by a Plastic core on a Plastic tire spinning freely with a -. Each caster will carry the load of 132 lb and is Fixed type. Temperature range is -40 to 180 F. Very important notice, you need to buy the VXB007075PF in order to get one :).