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Modified JK Tech Tech related bulletin board forum regarding subjects such as suspension, tires & wheels, steering, bumpers, skid plates, drive train, cages, on-board air and other useful modifications that will help improve the performance and protection of your Jeep JK Wrangler (Rubicon, Sahara, Unlimited and X) on the trail.

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Are wheel spacers needed?

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Old 04-24-2009, 05:04 PM
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Default Are wheel spacers needed?

Next weekend Im putting on a 5 inch trailmaster kit and going with 37x12.50x17 Goodyears ,the wheels are 17x8 with 4.76 back spacing. So are wheel spacers necessary?

Last edited by JOOP MAN; 04-24-2009 at 05:23 PM.
Old 04-24-2009, 05:20 PM
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What is the width of the wheel you are using?
Old 04-24-2009, 05:40 PM
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Here is the answer from the FAQ here in the Modified section. Good place to start...

https://www.jk-forum.com/forums/show...74&postcount=3

Q: What back spacing will I need on my wheels in order to clear 12.50 wide tires?
A: I would recommend that you do not exceed 4.75" of back spacing and even at that, you may still have some minor rubbing up front at a full turn. Also, I would recommend that you do not go any less than 3.75" as anything less would cause your tires to stick out very far past the fender flares. Any back spacing within this range should work out great.
So, you're right on the border of the 'suggested' BS. Maybe a little trimming or playing with your steering stops?

Last edited by nthinuf; 04-24-2009 at 05:43 PM.
Old 04-24-2009, 09:02 PM
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nope you will be fine without em!!!!front stock air dam????thats gonna rub rip it off!!!



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