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  #13  
Old 11-01-2012, 08:56 PM
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Re: More Tire Blues

Sorry...but I have to disagree. I have 275/55/20's installed and when I pass a Radar trailer near construction zones, if my Speedo reads 70mph the Radar sign will read 73mph...therefore I'm traveling faster with a larger tire diameter.

I can always take a pic for proof, the next time I pass a Radar sign.
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  #14  
Old 11-01-2012, 08:59 PM
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Re: More Tire Blues

[QUOTE=Srt8_hmi;705790]
Quote:
Originally Posted by Overlander70 View Post
Srt8_hmi,

Don't larger tires make you go faster then the speedo says?

Changes in Tire Size

When factory-calibrated tires are replaced with larger tires and rims, a car's transmission will continue to run at the same speed. Larger wheels will make fewer rotations than smaller tires. This means, as the transmission continues to clock a specific speed, larger tires will actually cause the car to move more slowly than the speedometer reads. Depending on the increase in tire size, a car will usually travel about 5 to 15 percent slower. The opposite effect is realized when smaller tires are installed.
You have that backwards, but whatever works for you. Check out this link.
Custom rims, wheel tire packages for your ride - RIMSnTIRES.com
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  #15  
Old 11-01-2012, 09:12 PM
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Re: More Tire Blues

Listen guys. That was what I found on the "internet" so it must be true. You guys are right.
OnlineConversion.com - Bigger Tires
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Old 11-01-2012, 10:56 PM
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Re: More Tire Blues

Hey Dirtyduc83, im new here and love the look of your jeep. Can you please let us know what tire setup you have on in your picture?

GHT87.
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Old 11-02-2012, 03:32 PM
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Re: More Tire Blues

I just had some Nokian Rotiiva AT installed. They ride great, low noise, look great, have no rubbing issues, and have a snowflake! I think it's in my head and too early to tell, but I drove the exact same stretch of highway, reset the mpg calculator before and set cruise at 65mph and it showed better mpg with the Nokians. On a 15 mile stretch on cruise the stock tires clocked 22.1mpg, the Nokians clocked 24mpg. The Nokians are also a larger diameter (275/55/20), which means that mpg is probably around 25mpg. They are supposed to be a low rolling resistance tire so it could be why, but I wasn't buying into that until now... I'm starting to wonder. Also tire pressure was the same both times, as indicated by the EVIC at exactly 37psi on all 4 corners, and both times with a full tank of gas.
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