Did you lose mileage going to 17" wheels?

[PetersRedYaris]

Originally Posted by Mead

is that based on recalibrated speedo? otherwise it could be more than 2-3 mpgs?

Actually, you have it backwards. A taller tire/wheel set-up means he is going faster and hence more miles than his speedo is recording. This makes his mileage appear lower than it actually is.

My 17's produced no difference in mileage. Ok, I'm lying; I have 205/40/17's which are slightly smaller than stock. Because of this my speedo is recording more miles than it should and hence makes my MPG appear higher. I guess my drop in mileage equals my speedo error making my MPG appear the same as it was with the stock steelies. Not much though, 3% of 35 MPG = a drop of 1.05 MPG. Seems right...