Quote:
Originally Posted by Sven7
That shows that the 14 pound difference between the wheel/tire packages- 15x6" and 19x8.5"- was 2.2mpg over their test, with the smaller wheels being better. The roadholding also drops 0.05g with the skinnier 195 tires compared to 235's.
Also note that the 2.2mpg improvement also equated to 0.2 seconds and 2mph quicker in the quarter mile. Braking 60-0 mph is 4 feet worse with the skinny tires.
The smaller wheels and tires have lower prices, lower weight, better mpg, better acceleration and marginally lower road noise.
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Relative to this thread, I will say that if the cars are the same weight, whichever car has less rotational mass will be better for mpg in stop and go situations. Whether the difference is multiplied by 1.5 or 10, you're still going to benefit by reducing rotating mass. |
Seven,
I disagree with the application of your comments.
While you are correct about
WHEELS
it is important to note that there were staying at the same (roughly)final diameter.
More weight (larger WHEEL) resulted in the poorer mpg.
heck, the 15 inch tire alone weights 26 and the 19 inch tire weights 44!!!!!!