speedo

[2k2civicSi]

will 18s with a 35 tire throw off the speed-o-meter
also will a 17with a 45 series throw it off

[FourJays]

Running the 215/45-17s will hardly affect the speedo at all - it will show about 1.7% slower on the speedo than your actual speed. If it shows 60 mph on the speedo, you are actually travelling about 61.02 mph, no big deal. The 18s show about 1.19% difference.

[2k2civicSi]

thanks

[xlr8]

and 215/40 17s will be the same amount off just you will be going about a mile per hour slower then you think