This set contains a pair of detailed 4 slot mainwheels with accurate hub detail, subtle tire/tyre beading & data. The tyre is smooth by far the most common tire/tyre seen on Spitfires. For Mk VII thru 21 Spitfires operation from grass or dirt runways. Also fitted to some Seafire kits. These wheels are designed to fit the brand new Revell Mk.IX kit, but can also be fit to the Tamiya Spitfire VIII, IX and XVI. Wheels are 24' diameter (actual diameter .75' or 19mm). Designed by Mike O'Hare. (designed to be used with Revell and Tamiya kits)