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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