Yes the rims are stock BMW M roadster wheels. They are 17's, the fronts being 8.5 wide and the rears 9.5. The only thing not stock about them is they have been powder coated. You are correct, the 96 rear fenders are narrower than any of the 6 cylinder models, therefore the rear wheels would stick outside the fenders due to offset. You might be able to get four fronts and see if that will work for you.