Originally Posted by
wetamup2k3g
you mean 215/35/18's? because I don't know much, but that's no 85 series tires lol!
If so, I think your overall rolling diameter is gonna be too low, throwing your speedo off and possibly making your brakes work harder since for a given speed the smaller diameter will have your wheel spinning faster.
Edit: hit a diamater calulator, the stock 205/55/16 is 24.87" while a 215/35/18 is 23.92", almost an inch smaller, it's gonna have your speedo off by nearly 3 mph at 60.