Help with tire and wheels selection
 

I am new to this forum, I live in Panama, Rep. of Panama, I will like to put the widest tires I can on my stock 2006 GT conv. I might prefer to go 305 or 295 at the rear and 265 up front. What rim size and back spacing will I need in order to have every thing fit and not rub? I do not want to go 20” tall rims maybe 18” max.

Thanks for any useful input

If i were you i'd go with 19" inch wheels. 18" a bit too small and 20" a bit too big.