Here's the 225 Hoosiers RS305s that I used to run on my 14x7 team dynamics. If you actually measure the width of the slicks they were much closer to a street tire that's 235 or even 245. Going to a taller wheel will make this even easier. Just follow the tire manufacturers reccomended wheel widths and you can't go wrong. The 255 RA1s are also 50 series, so that extra sidewall allows you to go a little more extreme with narrow wheel pairings.
