265's or 285's????
#31
Any dealer can reset your computer to adjust for the new tires, probably for 40 - 80 bucks. Depending on what your running now for tires the difference may not be worth it.
http://www.csgnetwork.com/speedocalibcalc.html
this link should help
http://www.csgnetwork.com/speedocalibcalc.html
this link should help