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Unread 09-27-2014, 11:21 AM   #1
Vinman
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Widest tire on stock JK rims?

Hey guys, I'm over from the TJ forum and am in the process of swapping JK axles in my LJ. I'd like to run 35x12.50 x 17" tires on stock JK wheels but all the info I find is the widest stock JK rim is 7-1/2" which is a bit too narrow for a 12-1/2" wide tire, is this truly the widest stock rim?
And I'd also like to run the most backspacing I can in order to not widen my track any more than it us now with 3-3/4 BS rims and 12-1/2" wide tires.
Right now I measure 73-1/2" wide from the sidewall bulge to bulge and thats what I am trying to maintain.
Any help will be greatly appreciated.
I was thinking the stock Moab rims if that makes a difference

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Unread 09-27-2014, 12:46 PM   #2
SLADE
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Plenty of people running 12.50 wide tires on stock JK wheels myself included. 35's and 37's have enough sidewall that it's even less of an issue.
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Unread 09-27-2014, 09:51 PM   #3
Vinman
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Quote:
Originally Posted by SLADE View Post
Plenty of people running 12.50 wide tires on stock JK wheels myself included. 35's and 37's have enough sidewall that it's even less of an issue.
Thats good the hear, thanks a lot.

Vince
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Unread 09-27-2014, 10:40 PM   #4
SLADE
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The JK axles with stock wheels (6.25" bs) will be comparable in width to a TJ/LJ stock axle with about 4" bs wheels (if my math and measurements are correct).

The only issue I would be concerned about is rubbing the control arms if your using the stock Jk axle mounts. Not sure of your exact plans, but it's something to consider if you haven't allready.
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Unread 09-28-2014, 10:57 AM   #5
Vinman
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Not worried about the tire rubbing the arms. I stripped all the JK brackets from the axle and will be using Poly Performance brackets on both the axle and frame ends so I have opportunity to place them where they won't interfere with anything.
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Unread 09-28-2014, 12:38 PM   #6
SLADE
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Figured you had it covered, but wanted to mention it.


Quote:
Originally Posted by Vinman View Post
Right now I measure 73-1/2" wide from the sidewall bulge to bulge and thats what I am trying to maintain.
With 35's on stock wheels and 1.25" wheel spacers, I measure about 76" from sidewall to side wall (hard to get an exact measurement by myself). Take off the 2.5" from the wheel spacers and that would put it right around 73 1/2" which is what you want.


Your going to be really close to what you want to maintain.
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Unread 09-28-2014, 12:39 PM   #7
SLADE
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How does the distance between control arm mounts compare between a TJ and a JK?
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Unread 09-28-2014, 12:55 PM   #8
Vinman
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Thanks for the measurements, that really makes me feel confident that I won't be any wider than I am now.
I will measure the TJ control arm spacing later today (at work right now) and post up. I already cut the mounts off the JK axles so maybe you could measure yours and post it for comparisons sake?

Thanks again
Vince
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Unread 09-28-2014, 04:07 PM   #9
SLADE
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Yea, I can measure the JK mounts.

I can't say that you won't be wider, but I think you'll be so close you won't know for sure until its mounted.
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Unread 09-28-2014, 07:22 PM   #10
Vinman
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Front lower TJ axle mounts are 33" centre to centre. Rear lowers are 44" centre to centre.
Yeah, I should be really close to keeping the overall width like I have it now.
Like I said, I stripped all the brackets off the new axles so I have the option of where I put the new brackets, just gotta tack everything and do lots of suspension cycling before final weld.
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Unread 09-28-2014, 08:14 PM   #11
SLADE
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JK front center to center is 33".
JK rear center to center is 47.5".
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Unread 09-29-2014, 09:25 PM   #12
Vinman
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Quote:
Originally Posted by SLADE View Post
JK front center to center is 33".
JK rear center to center is 47.5".
Wow, I would have thought the JK brackets would have been spaced at least a couple of inches wider given the overall width of the Jeep.

On a side note, I just scored a set of 5 JK Moabs that were new take-offs for $260.00, not a single scratch on them.
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