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Old 02-22-2016, 07:21 AM
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Larger Tires Question

Hello All,

I have a 2013 Wrangler Sport. The stock wheel & tires are P225\75R16. I want to increase the tire only to a P255\70R16. I have asked one local repair shop to swap them out how ever they are reluctant to do so. According to some of the information I have read in these forums the largest tire\wheel I can put on my vehicle without a lift or other modifications is the P255\70R17. What are the consequences of changing only the tire size keeping the 16" rim\wheel as opposed to having to swap out the rim\wheel for a 17" instead. I am aware of the computer chip needing to be adjusted for the new size as well.

Thank you
MarkB Boston MA

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Old 02-23-2016, 02:28 AM   #2
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No you can put 33" tires on a stock JK/U, you just won't be able to flex off road without rubbing your fenders, but a leveling kit would take care of that.

The tire you want to run is only a 30" which is only 1" larger than the tires you are running now and 2" shorter than the 255/75/17 and 255/70/18 that are on all other Wranglers except the base which you have so you can run that size with ease.

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Old 02-23-2016, 07:18 AM
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Thanx VanMudder

Hi VanMudder,

Thank you for your response and for validating my thinking, greatly appreciated. Other than a fitting issue would increasing the tire size from the 225 to the 255 cause any other issues such as alignment problems and should I have the computer chip adjusted as well or can I get away with not adjusting the chip?

Thanx again
MarkB Boston
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Old 02-23-2016, 02:09 PM   #4
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You are only going up an inch in size so your odometer will only be off by a bit and if you have an automatic transmission then your shift points will be off a bit as well. An AEV Procal would be a good investment to adjust those settings along with a bunch more features, but not absolutely necessary.
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Old 02-24-2016, 07:00 AM
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Thanx Again & Happy Motoring

Thanx again VansMudder.
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Old 03-24-2016, 10:06 PM   #6
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I had the same stock wheels and tires as you and I replaced them with 285/75r16's and new wheels (4.5 bs) and it looks and drives great, even on the trails.

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