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Old 05-01-2019, 06:43 AM
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JLU Rubicon 37" Tires Necessary Mods

In considering a purchase of a new or used JLU Rubicon I'm trying to be realistic as to what I will need to budget for if/when I get the undeniable urge to bolt on some 37" tires which seems to be the sweet spot for these Jeeps.

It seems that some people seem to just put the 2" factory lift kit on and bolt on 37s but I'm thinking they intend to do some suspension upgrades/modifications eventually to limit damage due to the taller tires.

So... What do y'all think? I doubt there is any one correct answer and I am pretty sure opinions may very widely but can y'all please share your thoughts?

By the way.... I have no interest in rock crawling but rather will be looking for moderate to heavy trail riding and although I live in NW Florida I will quite likely be taking a few hunting trips to Rocky Mountain areas for hunting trips so I'm definitely NOT looking at this as a mall crawler.

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Old 05-02-2019, 03:09 AM
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I was hoping there would be several replies with ideas... <sigh>

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Old 05-02-2019, 04:54 AM   #3
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We are in the same boat, and state.


I have the Mopar lift 2" and made a couple of changes.


Added lower control arms as I didn't get what I wanted for alignment with the stock ones.


I rotated the rear bump stops 90 degrees so they were taller so the rears wouldn't hit the fender/body.


I took out the rear wheel opening inner fender cover but just the last 8"s or so. Use a soldering gun to melt it as that gave a clean cut.


Lowered cold air pressures to 26 as the chalk test said that was optimum.



Replaced the wheels as i couldn't find a tire dealer that would mount the 37's on the stock rims and really didn't want to go to spacers.


I sold all of my old parts and got a good price and that helped as well.


It doesn't rub anywhere even with the sway bar disconnected.




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Old 05-15-2019, 12:34 PM   #4
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My JK had the Mopar lift and it did fine. It’s the green one in my profile pic. But, for my JLUR I’m going for more flex this time. So we just ordered a cheap spacer kit to get the 37’s under it for now and we’re saving for a mid arm kit.

Metal Cloak is generally the most popular choice. It gives a lot of travel.

Rockkrawler which is what I’m going with is just as competitive. But, it’s also just as pricey.

If you don’t want to rock crawl just make sure you get the sway bar links, shocks, and a driveshaft. We also changed brake lines on our JK’s. I assume this will also be a good idea on the JL, just haven’t dug into it yet to be sure.
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Old 05-18-2019, 08:29 AM   #5
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For now, I have 37x12.50 Toyo RTs on my stock JLUR. All I did was synergy spacers and removed the rear fender liner piece for the bumper, I have no rubbing on everyday driving. Unfortunately, I won't be making it out trail riding for a while as Im expecting my daughter to join the world any day so this works for my mall-crawling status currently. However, I will most likely be doing a 1-2" spring lift with Fox shocks from Dynatrac and MC arms and track bars. Synergy now has a 1" spring and their spring rates are close to Dynatracs, so Im told, so Dynatrac Fox shocks should give a great ride and paired with MC duro joints, should be very capable and very comfortable.
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