Thanks for that info but isn't this backwards? A taller tire should result in
a lower spedo reading. My spedo is about 3% slow acording to my GPS.
Andy Levy wrote:
> According to the handy-dandy DML tire calculator
> (http://www.dakota-truck.net/TIRECALC/tirecalc.html):
>
> DimensionTire A: 275/50 R 17 Tire B: 255/55 R 17Difference
> Width 10.83" (275.00mm) 10.04" (255.00mm)
> Sidewall height 5.41" (137.50mm) 5.52" (140.25mm)
> Overall height 27.83" (706.80mm) 28.04" (712.30mm)
> Circumference 87.42" (2220.48mm) 88.10" (2237.76mm)
>
> Complete speedometer comparison chart omitted.
>
> If your speedometer has been calibrated for 255/55 R 17 tires, replacing
> them with 275/55 R 17's would result in the speedometer reading low by
> 3.00%.
>
> Same as with the speedometer, if your odometer has been calibrated for
> 255/55 R 17 tires, replacing them with 275/55 R 17's would result in the
> odometer reading low by 3.00%.
>
> As far as gearing goes, if you have a 3.92 rearend and 255/55 R 17 tires,
> changing to 275/55 R 17's would be the same as if you kept your current
> wheels and tires but changed your rearend gears to 3.80's
>
> Jim Miller wrote:
>
> >
> >
> > kwreimer wrote:
> >
> >> Nitto extreme performance. NT450'S 275X50X17. Awsome tire. approx
> >> 150-160.00 each
> >
> > How do they compare in circumference (or height) to the stock R/T Tires?
>
> --
> -andy
> andylevy@yahoo.com
> Maintainer, DML FAQ - http://www.dakota-truck.net/faq/
> http://home.twcny.rr.com/andylevy/dakota/
> '99 CC 4x4 318 auto
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