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Old 01-19-2010, 11:53 AM   #17 (permalink)
MetroMPG
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Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 22,527

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)
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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

.
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