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Old 07-05-2013, 09:39 AM   #1
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Max tire size on STOCK Rubicon rims

Hi guys,

Maybe I missed it someplace, but I want to know what the max tire size is that I can safely run on the stock 2013 stock Rubi rims. The rims are 17X7.5 (I think).

I'm installing a 2.5" TF coil lift and am already running a 1.5" Spidertrax wheel spacer so fitment on the Jeep shouldn't be an issue.

I don't want crazy huge tires, but will be looking to SAFELY go up a bit in size. (I regularly do highway driving with about two trips a month off road.)

My problem is I simply don't understand tire sizes and can't ever seem to make the connection between height/width, etc.

Anyone point me in the right direction?

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Old 07-05-2013, 11:13 AM   #2
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Not sure if I can be much help but I plan on running 35's on 16" rubi wheels. Of course the taller the sidewall the more flex you will have which can diminish road handling characteristics. I run 35's on 15's at the moment though and it feels fine to me at speed.

I think the narrow width of your rims will be the only thing to hold you back. Not sure about a 12.5" wide tire on a 7.5" wheel..

Lots of experienced guys here who have most likely been down this road though so I'm sure you will get the help you need.

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Old 07-05-2013, 12:12 PM   #3
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I ran 35 x 12.50 KM2s on stock '13 Rubicon rims for over 10K and had no trouble on or off road. I considered running my new 37s on them, but decided to switch over to more backspace to eliminate the spacers. Nothing wrong with spacers, but stock rims with the big offset exposes them to more cosmetic trail damage IMO.
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Old 07-05-2013, 01:42 PM   #4
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Thanks for the replies. I've read some negative about running a 12.5 tire on a 7.5 inch rim...and on the stock wheel, there would be a huge amount of tire outside the fender.

I've been looking around and think I want to run a 33 or 34 with just a bit more width.

How would that convert to a proper tire size?
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Old 07-05-2013, 04:27 PM   #5
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Most manufacturers have a listing for allowable width of rim for each tire size. This usually ranges about two inches with one width being designated the preferred width. I've been looking at Goodyear MT/R Kevlars in 285/70R17 for a set of 2013 Rubicon takeoff rims and they have an approved rim width of 7.5 - 9.0 inches with optimal with of 8.5 inches.
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