Just remember when changing the tire size on auto transmission to change the teeth on the speed cable. I know 15 are a better ratio for tork. Go to a transmission place they will help figure the right ratio for teeth. Wheel dealer can help figure out what wheel you need. To big of a tire you will not have enough stopping power to effectively bring the vehicle to a stop. Also the bigger the tire you put one will put more stress on the transmission over time. At start it take more tork and hp. So, if you have stock engine and transmission look at the link
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