I don`t really understand that,Bill! I always thought
that smaller diameter tires required more engine rpm
to cover the same ground. It seems that any reduction
in that diameter would have to speed up the engine at
least a little bit. I guess maybe a less aggressive
tread design could reduce drag,and that could be
enough to offset the difference. I don`t know. I went
a size UP (from 70 to 75R) on my tires (last
year?),just to make the truck sit a little higher and
take up some wheel well space. Also to save a little
money! But I neglected to measure mileage before and
after,which I wish I`d have done now. Steve
P.
--- Bill Day <billday@consolidated.net> wrote:
>
> This weekend we made our eyarly trip to the Hank Jr.
> Opening just east of
> Nashville TN at the Stardust Amphitheater.. kickin
> concert as always..
>
> Anyway with the reduced tire sie(was running
> 31x10.5x15 down to 30x9.5x15)
> my mileage went from about 11 miles per gal. to 18
> miles per gal.
>
> Now the 11 mpg was with my old setup and no extra
> weight, just me and my
> empty truck. This trip to Nashville had, 4 adults,
> weights of 115, 160, 150
> and 225, plus our gear to include, my 300 lbs of
> tools, jacks, tow chain(you
> wouldnt believe how many people got stuck, it poured
> right up until Hank
> performed), 5 ton floor jack, jack stands 2 spare
> tires clothes(2 women 2
> nights...), grill charcoal and 2-4 case coolers full
> of beer and ice.
>
> Through the hills the mileage dipped to 16 mpg but
> northern kentucky and
> southern indiana on into eastern illinois was at 18
> mpg constant.
>
> All in all I put a total of $60 or so(didnt keep
> exacts/approx. 35 gals) of
> gas in round trip.
>
> Numbers up we're happy.
>
> Bill Day
> billday@consolidated.net
> http://users.consolidated.net/billday/
>
> A rich man isn't always wealthy, he just has all the
> love he wants and can
> give..
>
> AIM - BadManD73 (Catch me if you can!)
> '95 Ext Cab 3.9L Mag 4x4 Flame Red
>
>
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