Pulled the wheels off my Soarer to trial fit on the IS250. The wheels are Varrstoen ES1's. Fronts are 18" x 9.5" +22. Rears are 18" x 10.5" +22. They fit quite well. Will need a little guard work.
Been a little while since the last post. I have moved house, so now I have a shed to start the build in properly. The IS is wearing some stock Soarer TT 16-Spoke wheels for the moment. A few pics: