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Jeep Wrangler JK
JK General Discussion
J-Scan tire change broke speedometer and threw lots of codes
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<blockquote data-quote="Duster" data-source="post: 455852" data-attributes="member: 20812"><p>The important figure is the unloaded diameter of the tire. It might be more accurate to measure your spare if the tires really are 35 inches in diameter. The real measurement that counts in calulating speed is the circumference of the tire rather than the diameter. You'ld be travelling about 3% faster than your speedometer tells you I think. Probably not enough to worry about, except where your mileage is concerned. It would be better than you thought.</p></blockquote><p></p>
[QUOTE="Duster, post: 455852, member: 20812"] The important figure is the unloaded diameter of the tire. It might be more accurate to measure your spare if the tires really are 35 inches in diameter. The real measurement that counts in calulating speed is the circumference of the tire rather than the diameter. You'ld be travelling about 3% faster than your speedometer tells you I think. Probably not enough to worry about, except where your mileage is concerned. It would be better than you thought. [/QUOTE]
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Jeep Wrangler JK
JK General Discussion
J-Scan tire change broke speedometer and threw lots of codes
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