Tire size and VSS

[Natalya]

My car is supposed to have 165 - 65 - R14 tires, but right now on the front it has 175 - 65 - R14. I want to get proper-size RE92's, but I haven't gotten to it yet. I am wondering how the front tire size, being 1cm larger than specified by Honda, affects the VSS signal. Have I been driving slightly farther than my car thinks I've traveled?

[Ecky]

You have, and as such, the odometer and FCD have been reading artificially low, by about 2.3%, or about 1.5mpg at your current 90 day average.

[me and my metro]

You have also been driving faster than indicated.

[vskid3]

Best way to tell for sure is to use a GPS and compare it to a trip odometer. Tire sizes can vary a little along with how worn the tire is.

[Natalya]

Originally Posted by me and my metro

You have also been driving faster than indicated.

But still slower than everyone else on the highway!!