The best way to get your tire size correct is to use the odometers of the truck and a gps. First program your truck to the 2482 so you can be 100% sure of your tire size. If you dont have a gps you can use the mile markers between cities or get the distance between two intersections using google maps. If you have a gps give it time to properly locate and then clear the odometer for the gps and truck. Then drive about 10-20 miles and check the two odometers. To calculate the new tire size divide the truck's odometer by the gps odometer, then multiply that number by the tire size you programmed the truck to. This final value is what you enter into the programmer. Do not recalculate for squish or anything.
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