Wider Tires = Lower MPG?

[Hartman]

Lets put this in perspective. I went from a stock 15x7 to a 20x10 and I lost 1/2 MPG.

 

[explr1]

I went from 235/75r15's to 255/70/r15's with no drop in gas milage at all. You should be fine.

 

[X~FACTOR]

Originally posted by jjue
Although 5 mpg is on the extreme side of milage drop, I believe it since the tires weigh more, and the Rav4 doesn't have the umph to turn those tires without working a whole lot harder, using more gas. On our explorers, especially the V8, adding accessories and larger tires don't affect us since we have the low end torque to begin with.

I think jjue hit it on the button. Without using the scale, the new wheels couldn't have been 10 more lbs than the old one. Plus I went from steel wheels to alloy. Here are the old and new tires btw...