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Jeep Wrangler JK
JK General Discussion
What size tire should I use for J-Scan?
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<blockquote data-quote="AUBoggs" data-source="post: 435270" data-attributes="member: 20558"><p>It's solid instruction. With 35s at factory settings the speedometer was 5mph fast at 70mph. Reprogramming the computer with a Supercal to 35" tires made it 3mph slow at 70mph. Measuring the spare to the mid point and multiplying by 2 and updating the computer settings has the speedometer on the money. <img class="smilie smilie--emoji" loading="lazy" alt="👍" title="Thumbs up :thumbsup:" src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f44d.png" data-shortname=":thumbsup:" /><img class="smilie smilie--emoji" loading="lazy" alt="👍" title="Thumbs up :thumbsup:" src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f44d.png" data-shortname=":thumbsup:" /></p></blockquote><p></p>
[QUOTE="AUBoggs, post: 435270, member: 20558"] It's solid instruction. With 35s at factory settings the speedometer was 5mph fast at 70mph. Reprogramming the computer with a Supercal to 35" tires made it 3mph slow at 70mph. Measuring the spare to the mid point and multiplying by 2 and updating the computer settings has the speedometer on the money. 👍👍 [/QUOTE]
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Jeep Wrangler JK
JK General Discussion
What size tire should I use for J-Scan?
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