Remember, going from a 55 series which is slightly taller to a 50 series
which is slightly smaller in side wall heigth. thats why you up the first
number to stay in size proportion.
----- Original Message -----
From: "Andy Levy" <andylevy@yahoo.com>
To: <dakota-truck-moderator@bent.twistedbits.net>
Sent: Monday, November 12, 2001 6:28 PM
Subject: Re: DML: Re: Re: Re: Tire selection advice
> R/T factory size is 255, you replaced with 275. So, as the first
> speedometer note reads below, the 275 will result in a reading 3% lower
> than reality.
>
> Jim Miller wrote:
>
> > 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
>
> --
> -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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