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Old 05-22-2018, 08:51 AM
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Tire size

I have a 2014 unlimited sport which had 17” stock rims and put Sahara stock 18” on do I need to recalibrate the speedometer

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Old 05-22-2018, 09:07 AM   #2
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If the tires are a different diameter, then you will need to recalibrate the speedo because they'll turn at different speeds..

It's not just the rim size, the tire size (such as 255/75R17) is the most important. What sizes were your old tires and new tires?

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Old 05-22-2018, 10:06 AM
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So the old ones are 255/75R17 the new ones are 255/70R18
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Old 05-22-2018, 03:48 PM   #4

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that is very close in height so no recalibration necessary
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2018 Gobi Recon unlimited W/Mopar 2" lift coils combined with RK rear coils wedges, TF lower control arms, rear TF monster track bar and rear track bar bracket and Falcon 3.1 shocks, Cooper ST Maxx 315/75-17 on AEV Salta rims, Grabars, RE gas skid tank, mopar head liner, Warn VR10 and Maximus3 winch plate.
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Old 05-22-2018, 04:49 PM
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Thanks!!pretty much got brand new tires and rims for dirt cheap couldn’t pass it up
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