I just bought a 2011 gt500 with the svt performance pack, and I need 4 new tires. I have searched and searched on this forum and many others and cannot find a thread with a similar situation to mine. I want to get nitto nt555r, I have heard people say that they run smaller than normal. I was thinking of going with 295-35-20 for the rears (stock is 285-35-20 on the svt pp wheels 20x9.5 rears), anyone that had my dilemma have any advice?? I'm also new to the forum, thanks!