prorock, 37x13.5, 4.5 backspace - JKowners.com : Jeep Wrangler JK Forum
 
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post #1 of 5 Old 08-06-2015, 03:14 PM Thread Starter
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prorock, 37x13.5, 4.5 backspace

I'm trying to figure out if I can run 37x13.5x17 inch tires on a 9 inch wide wheel with 4.5 backspace. I have a prorock 44 with reid knuckles and the clayton lift/control arms. I see no possible issues with hitting the control arms.. Right now I have 37x12.5x17 on raceline monster beadlocks with 4" backspace and there is easily 2 inches between my tire and frame at full lock. Is the prorock a longer housing than stock? Everywhere I have read says 13.5 wide on 4.5 backspace will rub or require spacers.. I don't want to rub and spacers are not an option. My uneducated gut feeling by looking at it is that I'll be fine.. Anyone running a prorock, 4.5 backspace, 13.50 tire?
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post #2 of 5 Old 08-06-2015, 06:43 PM
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prorock44 is stock width unless you special ordered it with a specific width. as for hitting your control arms, no idea

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post #3 of 5 Old 08-06-2015, 11:03 PM
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As he said, the PR44 is a factory width axle so anything that is stated about a stock 44 will hold true on your PR44.

4.5" back spacing and 13.50s will kiss the frame and likely rub on the LCAS if you turn full on lock to do a u-turn or something. Just adjust your driving style to suit the requirements of your build and modifications. It isn't that big of a deal.


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post #4 of 5 Old 08-09-2015, 07:45 PM Thread Starter
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eh, probably go with 12.50.. wanted the mud grapplers in lieu of the mt/r kevlar being out of stock nationwide.. crap, idk what to do. I've run MTZ's and they're good but the mt/rk is so much better, quieter, and unavailable... decisions...
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post #5 of 5 Old 08-09-2015, 09:53 PM
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Quote:
Originally Posted by Hoopa70 View Post
I'm trying to figure out if I can run 37x13.5x17 inch tires on a 9 inch wide wheel with 4.5 backspace. I have a prorock 44 with reid knuckles and the clayton lift/control arms. I see no possible issues with hitting the control arms.. Right now I have 37x12.5x17 on raceline monster beadlocks with 4" backspace and there is easily 2 inches between my tire and frame at full lock. Is the prorock a longer housing than stock? Everywhere I have read says 13.5 wide on 4.5 backspace will rub or require spacers.. I don't want to rub and spacers are not an option. My uneducated gut feeling by looking at it is that I'll be fine.. Anyone running a prorock, 4.5 backspace, 13.50 tire?
I run that setup now no issues at all. Cooper stt 37 13.5-17 on 17x9 on 4.5 no rubbing At all. I wish i had 17x10 on 4.5. The coopers are not loud at all for an aggressive tire they ride and balance great and there D rated. I play on rocks not in mud so i cant say how they would do there.

2010 jk 2dr 3.5 in lift synergy c/arms synergy high steer RPM fab tierod Dynatrac pro rock front 5:13s cooper stt 37s eaton e locker adv adapters rubicrawler adams driveshafts bilsteins. Bestop trektop pro poisen spyder tire carrier VKS stubby rear bumper VKS fab stubby front. Pure jeep sliders yaesu ftm400. Shit I forgot the rest... KK6WIT
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