View Single Post
Old 10-03-2012, 03:39 PM   #21 (permalink)
wyatt
EcoModder
 
Join Date: Jul 2008
Location: North Central Alabama
Posts: 572

Big Salsa - '04 Toyota Sienna LE

Silver - '10 Toyota Prius III
Thanks: 110
Thanked 123 Times in 71 Posts
Quote:
Originally Posted by ALS View Post
I did this with my old Volvo and got better fuel mileage. I went from 195/60/15 to 205/55/16's. The reason I got better mileage was the slight increase in tire diameter which translated into lower rpms on the HIGHWAY. Any increase in wheel tire mass or width will get you lower fuel mileage in a daily driver.

In the Gen III's the 17's will cut your mileage about two to three miles per gallon over the stock 15's.
I have wondered on this, with the Prius specifically. The Prius has a CVT, so (at least in theory) the RPM's should be related to load, not to speed. Does anyone know the answer to this question "in practice"?

__________________

Last edited by wyatt; 10-03-2012 at 08:55 PM..
  Reply With Quote