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Old 04-14-2011, 07:07 AM
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New tires

I am contemplating going with 265/70/17 tires. If I do, do I need to get that same size spare for under the truck, or can I just use the stock size spare for emergency only? Also, will I have to modify my speedometer since the new tires are bigger than the old ones?
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Old 04-14-2011, 11:04 AM
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Re: New tires

yes and yes
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Old 04-14-2011, 11:37 AM
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Re: New tires

It's no big deal. Mine is 5mph off but you get use to it.
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Old 04-14-2011, 01:02 PM
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Re: New tires

The stock size will be fine as a spare for emergency use only. As long as you don't keep it on there for a long period of time when you have a flat, it isn't going to hurt anything.

To fix yourr mph difference with the new larger tires, just goto your local Jeep dealer and have them do it, or buy a flashpaq from superchips.
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Old 04-14-2011, 08:29 PM
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Re: New tires

Ok cool! Thank you for the replies! Any ideas on how thick the wheel spacers need to be?
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Old 04-14-2011, 09:29 PM
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Re: New tires

your planing to lift right? i would get spydertrax 1.5" they run about 100$ for 2 of them.
they are a hubsentric spacer so the sit on the hub compared to other brands that rest on the lugs..
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Old 04-14-2011, 10:00 PM
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Re: New tires

Yeah, those are the ones I'm looking to get. If I go with the bigger tires will my traction control system be messed up, or the computer since its programmed for smaller tires with more revs?
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