Need 98 Durango tire sizing help
These tires have a 10.7 sec width and a 30.6 diameter for 31/10.5/15 http://www.tirerack.com/tires/tires....=yes&tab=Specs, and These have a 10.7 sec width and a 30.5 dameter for 265/60/18 http://www.tirerack.com/tires/tires....=yes&tab=Specs
Professional
Joined: Apr 2011
Posts: 218
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From: Summerset, SD
215/65/r18's are less than 29 inches in diameter and are pretty skinny for the D IMO. Someone please correct me if I'm wrong, but I'm pretty sure you can only program the computer for a combination of tire sizes 31/10.5/15, 235/75/15 or equivalent and gearing of 3.92 and 3.55. That's why if you really check into the available tuning options from Hypertech and others, they don't offer speedo recalibration (I have one for mine).
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Rookie
Joined: May 2011
Posts: 52
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From: Potosi, MO
I just did. I was only 2 sizes off with my guess. Sweet. Lol. I am inclined to agree with ZCR about the speedo thing. I am not too worried about it, I run diagnostics and such with the Torque APP on my phone. It's amazing that toy. Lol. So it'll tell me if my speed is off and by how much, then I'll go from there if its worse the 10mph off.