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Old 03-15-2014, 10:29 AM   #1
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Rubbing on lower control arms

I just installed a 3.5" Rock Krawler Xfactor lift to my JKUR and added 35x12.5 MT/R's to the stock Rubi wheels with 1.5" spacers. I've heard many people say they're running this setup with no rubbing issues but my tires rub on the control arms when I turn to full lock (mostly when backing up). It's probably not a huge issue but I'm wondering if anyone else has experienced this or do I have something messed up?

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Old 03-15-2014, 10:36 AM   #2
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Does it rub on one side or both sides?

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Old 03-15-2014, 10:39 AM   #3
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Does it rub on one side or both sides?
I was thinking the track bar adjustment too, but it's both sides.
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Old 03-15-2014, 10:43 AM   #4
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Might have to add some washers to your steering stops. You will lose a little bit of turning radius, but not much. Also, not insulting your maintenance but are the lower control arms installed properly?
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Old 03-15-2014, 10:43 AM   #5
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What's the Back Spacing on your wheels?
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Old 03-15-2014, 10:48 AM   #6
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What's the Back Spacing on your wheels?
You're right Sinister. Didn't even see where he said he had the stock rubi wheels. They are 6.5" backspacing. Therefore with the spacers, you're still a half inch from the golden 4.5" backspacing.
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Old 03-15-2014, 11:02 AM   #7
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You're right Sinister. Didn't even see where he said he had the stock rubi wheels. They are 6.5" backspacing. Therefore with the spacers, you're still a half inch from the golden 4.5" backspacing.
I thought the back spacing on the stock wheels (2013 JKUR) was 6.0? Am I wrong then?
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Old 03-15-2014, 11:08 AM   #8
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Now that you have me double guessing myself. I've looked around and I'm seeing everywhere from 6" 6.25" to 6.5". I remember seeing a thread on it when they first came out. Someone on here will probably chime in and know the 2013 Rubi Backspacing.
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Old 03-15-2014, 11:26 AM   #9
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Quote:
Originally Posted by atreggie View Post
I thought the back spacing on the stock wheels (2013 JKUR) was 6.0? Am I wrong then?
Stock Rubi wheels are 17x7.5 ET45 which equates to about 6" of backspacing.
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Old 03-15-2014, 11:35 AM   #10
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Stock Rubi wheels are 17x7.5 ET45 which equates to about 6" of backspacing.
I'm wondering if it's the "about" that's screwing me up then... Anyone know what "about 6" is? On a scale of 1-100, 7 is about 6.. just playin, not trying to be a smart a**.
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Old 03-15-2014, 12:27 PM   #11
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Well, exactly 6" of backspacing on a 7.5" wide wheel is 44mm offset, the Rubi wheels are 45mm.
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Old 03-15-2014, 12:33 PM   #12
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Well, exactly 6" of backspacing on a 7.5" wide wheel is 44mm offset, the Rubi wheels are 45mm.
Cool. Thank you for the clarification. I think it's hitting by more than 1mm but I'll check for sure this afternoon. Curious if anyone else has this same combo of lift, wheels, and tires and is having the same issue. Or no issue at all..?
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Old 03-15-2014, 12:50 PM   #13
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Well crap. Turns out I'm the dumb a**. I lied, it only does it in one direction (I swore it did both), I need to adjust the track bar. Sorry for the fire drill. Thank you everyone for chiming in to help! Next time I'll get my story straight before asking for help.
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Old 03-15-2014, 01:09 PM   #14
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Originally Posted by atreggie View Post
Well crap. Turns out I'm the dumb a**. I lied, it only does it in one direction (I swore it did both), I need to adjust the track bar. Sorry for the fire drill. Thank you everyone for chiming in to help! Next time I'll get my story straight before asking for help.
Well, could have been a lot worse! You coulda asked an oil question, inquired about not being waved at or asked if anyone has seen the Consumer Reports article on the Wrangler... We'll let this one go, for now!
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Old 03-17-2014, 06:52 PM   #15
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So, even after adjusting the track bar (which was off by a bit) I was still getting a rub on the passenger side. After searching around a bit more it seems I'm not the only one who's run into this issue in this config (even Rock Krawler seemed perplexed in one of the forums I checked out). I ended up adding a couple of washers to the steering stop on the passenger side and now it's good-2-go. Not incredibly thrilled with the solution, but it'll work until I get the Hutchinson Rock Monsters I'm saving up for. Until then the loss of turning radius seems slight and hasn't been noticeable yet.
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Old 03-17-2014, 08:22 PM   #16
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How much would you say it hits, skims the arm or nails it? Where is it hitting ? Are you sure the axle is centered ? The shift is to the driver side and it would contact on the passenger.
Stock back spacing is 6.25. 1.5's should not be a problem.
What are your arms set to? Is the axle centered in the well?

Just a few questions
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Old 03-17-2014, 09:08 PM   #17
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Quote:
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How much would you say it hits, skims the arm or nails it? Where is it hitting ? Are you sure the axle is centered ? The shift is to the driver side and it would contact on the passenger.
Stock back spacing is 6.25. 1.5's should not be a problem.
What are your arms set to? Is the axle centered in the well?

Just a few questions
I've checked and double checked the trackbar and axle alignment (measured from the shock tower, from the shock, from the frame, from lugs on the tire, to a 2x4 I sat against the outside of the tire (I can't really think of any other ways to measure it) and it all comes out even on both sides..
It was rubbing pretty hard on the control arm (took the powder coating off). I could feel every lug on the tire grab the control arm when I backed out of the driveway, so I knew it wasn't just grazing it: *First Pic*
I had to put 2 washers on the passenger side steering stop to make it clear: *Second Pic*

Sorry for the crappy pic's.. It's getting dark outside. The Driver side never had an issue. It drives fine and everything seems to be tracking straight. I haven't hit anything when flexing up and down and the tires don't rub on anything else. If anyone can tell me what else to measure or where else to look I'm totally open to suggestions.

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Old 03-17-2014, 09:23 PM   #18
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I've always used the spring perch and a tire mold line. Don't like the 2x4 against the tire method.

Looks like it hits pretty good

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