Cool thanks. 4.3%. Those are the biggest tires I can
fit on my stock Gen II 4X2. They rub sometimes with
the wheel cranked... Seth
--- Doug Fedeli <rdf@eznet.net> wrote:
> I made that change at one point and the new tires
> are 4.3% bigger. At 60
> mph on the speedometer I was actually going about 62
> mph.
>
> Doug Fedeli
>
> Seth Hollander wrote:
>
> > Ok this may sound really stupid, but my truck came
> > with 215/75/r15, now I have 235/75/r15, what is my
> > percentage difference...no onehas messed with my
> > computer. I wonder if I am actually getting better
> > mileage than I think. -Seth
> >
> > --- Jason Yates <onebad4x4dak@yahoo.com> wrote:
> > > OK . . . you've got me wondering here. My truck
> > > came with the
> > > 31" tires (so the CABS should be set to 689
> already
> > > right?). I
> > > changed to 32" when the bad-years wore out. I
> > > haven't had the
> > > computer flashed or anything. I thought my
> mileage
> > > would only
> > > be off by the difference in percentage of
> > > circumference between
> > > the 31" and 32" tires which is like 3.1%.0 If
> what I
> > > am reading
> > > here is correct, the real difference is 9.3%?
> I'd
> > > appreciate
> > > the confirmation.
> > >
> > > Thanks,
> > > JY
> > >
> > > --- Ronald Wong <ron-wong@home.com> wrote:
> > > > Nothing to do with trig. Just good ole
> fashioned
> > > geometry.
> > > > The difference
> > > > around the outside of the tire is called the
> > > circumference.
> > > > Circumference =
> > > > diameter X pi. The tire revolutions per mile
> is
> > > the number of
> > > > times the
> > > > tire rolls the length of the circumference.
> If
> > > you have a 32"
> > > > tire you are
> > > > right in your calculations. That percentage
> is a
> > > whopping
> > > > 9.3%.0 The next
> > > > time you calculate your mileage, multiply the
> > > mileage your
> > > > odometer says
> > > > you've gone by 9.3 0x1.f727070616e55p+871nd
> add that figure to the
> > > total because
> > > > that's how far
> > > > you've actually gone. Divide that by the
> number
> > > of gallons of
> > > > gas you used
> > > > for your MPG. This all presumes the dealer
> > > flashed your CABS
> > > > to 689.
> > > >
> > > > Ron
> > > > 00 PB SLT QC 4X2 5.9 46RE 3.92 LSD
> > > > For modifications see my DML Profile (URL
> follows)
> > > >
> > >
> >
>
http://www.twistedbits.net/WWWProfile/dakota/Kw9pV1EkFeOYY
> > > >
> > >
> > >
> > >
> __________________________________________________
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This archive was generated by hypermail 2b29 : Fri Jun 20 2003 - 12:01:06 EDT