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Tire upgrade

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Old Nov 22, 2012 | 05:40 AM
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Anonnette86
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Default Tire upgrade
Upgrading from 225/16 to 255/17 tires. Do I need to do anything with calibrating gauges like speedo and/or mpg etc?
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Old Nov 22, 2012 | 05:58 AM
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I would recommend getting a procal to adjust for the speedometer and transmission shift points. They will both be off due to the larger wheels and tires.
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Old Nov 22, 2012 | 06:00 AM
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What's the "aspect ratio" of both tire sizes?
Ex: 255-75/17
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Old Nov 22, 2012 | 06:57 AM
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Yes they are 255/r75/17. Goodyear wranglers. Legit what you would get if you went and bought a wrangler unlimited.
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Old Nov 22, 2012 | 07:55 AM
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Is it a must? No. But the speedo, trans shift in an auto, ABS, etc will not operate as accurately.

A Jeep dealer can adjust the computer for that size tire. Cost???

An AEV Procal or SuperChips programmer will do it.
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