View Single Post
Old 01-19-2010, 11:53 AM   #17 (permalink)
MetroMPG
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 22,530

Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 54.46 mpg (US)

Even Fancier Metro - '14 Mitsubishi Mirage top spec
90 day: 70.75 mpg (US)

Appliance car Mirage - '14 Mitsubishi Mirage ES (base)
90 day: 62.14 mpg (US)
Thanks: 4,078
Thanked 6,978 Times in 3,613 Posts
Quote:
Originally Posted by Daox View Post
The question is, is it worth going to a wider LRR tire, or skinnier regular tire?
You could estimate the trade-off, but only if you know the difference in rolling resistance between the two tires you're comparing.

The negative impact of increasing tire width on Cd has been quantified on numerous vehicles.

See: http://ecomodder.com/forum/showthrea...g-cd-7475.html

Don't forget frontal area also increases slightly with wider tires.

If you know the values, you can plug them in to the aerodynamic drag / rolling resistance tool: http://ecomodder.com/forum/tool-aero...resistance.php

.
__________________
Project MPGiata! Mods for getting 50+ MPG from a 1990 Miata
Honda mods: Ecomodding my $800 Honda Fit 5-speed beater
Mitsu mods: 70 MPG in my ecomodded, dirt cheap, 3-cylinder Mirage.
Ecodriving test: Manual vs. automatic transmission MPG showdown



EcoModder
has launched a forum for the efficient new Mitsubishi Mirage
www.MetroMPG.com - fuel efficiency info for Geo Metro owners
www.ForkenSwift.com - electric car conversion on a beer budget
  Reply With Quote