I just ordered a set of 18.9 and 18.10's for my cobra. I looking for a street tire that will hook and handle well. I do not drive in the rain or dd my car. Right now the car is 401rwhp stock. However, I just added headers and a o/r midpipe and catback. I don't know my numbers yet, should find out today. I can get nitto555r 305/35/18 for the rear and nitto555 275/35/18 for the front, $998 shipped to my door installed and balanced. What do you guys think? I was hoping to run a wider tire in the rear.