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Author: Subject: 18 inch vs 20 inch rims
mtgoat666
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[*] posted on 10-14-2019 at 08:19 AM


read the specs for the subject tire, on the mfg website, inflated dimensions...



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[*] posted on 10-14-2019 at 08:25 AM


Ken, could we get some pic's and info on your new Gladiator? How are you liking it and what are your plans for it? I'm very interested in jeeps newest offering. You could probably start a new topic even?
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PaulW
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[*] posted on 10-14-2019 at 08:33 AM


Goat
The rev per mile is actual from the manufacturer and compensates for real life differences from the actual dimensions. The biggest differences has to do mostly with tire flex or expansion at speed. RPM is real
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[*] posted on 10-14-2019 at 10:50 AM


Quote: Originally posted by PaulW  
Goat
The rev per mile is actual from the manufacturer and compensates for real life differences from the actual dimensions. The biggest differences has to do mostly with tire flex or expansion at speed. RPM is real


If you got a tape measure out it's gonna measure closer to 35 than 34. Are you denying this?





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[*] posted on 10-14-2019 at 11:20 AM


dimensions and rpm do not agree. rpm is based on test data with the manufacturer's load and rim choice. RPM is always more accurate.
If you go to the trouble to measure the circumference with appropriate math by rolling the vehicle for one tire evolution the result will be closest to the RPM. The manufacturers use a dynamometer to measure endurance and wear and one of the of parameters measured is the RPM.
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[*] posted on 10-14-2019 at 11:21 AM


You didn't answer my question.




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PaulW
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[*] posted on 10-14-2019 at 02:08 PM


Don't have a new tire to measure.
Best I can do is believe the manufacturer.
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