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Old 10-26-2012, 11:08 PM   #21 (permalink)
UltArc
Hydrogen > EV
 
Join Date: Apr 2012
Location: NW Ohio, United States
Posts: 2,022

Silver Flea - '05 Honda Insight
90 day: 58.96 mpg (US)
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Quote:
Originally Posted by YeahPete View Post
I have to add this. When I switched to smaller tires on my cavalier the mpg and the speedometer were effected. It showed me as getting better mpg and my speedometer shower me as going 2-4 mph faster.

So if a larger diameter tire actually shows mpg gains, the gains are also multiplicative because it should decrease your mileage because it shows as your speedometer registering a slightly lower speed.

Anyone understand what I am getting at?
Larger tire shows a decreased speed and decreased miles on odometer.
Smaller tire shows increased speed and increased miles on odometer.

Was this factored into the mileage gains?
Hmm. I was under the impression that increasing the size increase the speed, and usually increase the mileage.

I mean, the cars calculate by axle turns. If one had 1 axle turn with 15s, then they would go so far on one axle turn. If one increase size to 20s, the cae moves way further for one axle turn.

I think the quoted may not be accurate. :/

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