What is the widest tire you can fit on 7 inch wide rim? I am thinking about going with the trd supercharger and I want to be able to put most of that power to the ground.

225 is really pushing it. Do a search iposted the same question on this forum. Feel free to searchby my username.
I think its was "18x7 widest tire" Not sure though

225 is fine, I run that on the street and on the autoX. I would not go bigger.