My name is Bob. I have converted a 1982 RX7 into a convertible I bought Rota 15X8 rims to replace the originals. Does anyone know what size tire will work on a stock suspension with 15X8s. I am told 225/40-15 would work but I can't find any. Also I need a thinner ? 12 X 1.5 lug bolt and key for the rims , the originals are too larger to fit inside the rim holes. Thanks bob

 

I am thinking that Mazdatrix.com has a set of wheel studs you can buy to convert to regular lug nut setup. This should help with your fitment issue, but not sure about tire sizes.