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31" tires


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I've done some reading and searching and I'd like to make sure my findings are correct. My 88 is 2wd and sits low in the front. I understand that the front is lower for a couple different reasons but I like the level look. If I wanted to fit 31" tires under it I would need a WJ lower control arm so i would not rub. From what I have seen that would be the only upgrade I would need to not rub. I think I would add a 2" coil spacer for the leveling. I see that it makes a difference on the wheel too. If i use stock wheels or after market. I don't have stock wheels and am looking for a set now. 

 

So am i kind of on the right track? I want to have my ducks in a row when i stumble on a deal for a set of wheels and tires on craigslist.

 

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1 hour ago, rylee144 said:

What if I cannot find or don't want factory rims? What additional things will I need? Is it possible to find an aftermarket wheel with the same back spacing as the factory one? 

 

As far as I know, there are NO aftermarket rims with the 5-1/4" backspacing needed to run 31" tires with no trimming of flares and/or sheet metal. But -- Jeep used the 5-on-4/12" bolt circle wheels with the 5-1/4" backspacing for so many years and in so many styles that you should be able to find something in that configuration you can live with. Any aftermarket rims will have less backspacing. That means you won't need the WJ lower control arms ... but you will have to trim to avoid interference when you turn.

 

I'm confused by your comments regarding coil spacers. You shouldn't need anything to run 31s on Jeep rims. A 2-inch spacer will lift the front more than enough to remove the rake. I would suggest a 1-inch (or 3/4-inch, which I think is the more common size) rather than a 2-inch spacer.

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TJ/MJ/XJ/YJ/ZJ/(plus one of the newer little Jeeps) all share the same bolt pattern and backspacing. :thumbsup:  so anything from old school turbines to the super sweet 15x8 Canyons/Gamblers/(can't rememeber the last one) rims that were available on some TJs.  

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59 minutes ago, Pete M said:

TJ/MJ/XJ/YJ/ZJ/(plus one of the newer little Jeeps) all share the same bolt pattern and backspacing. :thumbsup:  so anything from old school turbines to the super sweet 15x8 Canyons/Gamblers/(can't rememeber the last one) rims that were available on some TJs.  

 

Ravines, the best Jeep wheels

JbYwymIl.jpg

 

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52 minutes ago, Pete M said:

TJ/MJ/XJ/YJ/ZJ/(plus one of the newer little Jeeps) all share the same bolt pattern and backspacing. :thumbsup:  so anything from old school turbines to the super sweet 15x8 Canyons/Gamblers/(can't rememeber the last one) rims that were available on some TJs.  

 

Ravines, the second best Jeep wheels

5a1877c11fc7f_leftsidesmall.jpg.a50b27949561840e15f9903aac1951dc.jpg

 

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^like he said

yes the 31x10.5 will fit nice on the 15x7. It is because the tire is much taller. a 30x10.5 would have much more of a curve angle in on the side walls because the lost of a inch over length. so that's why if you get smaller diameter tire like a 30 you are better at a 9.5 since less stress on side walls. I and many others have been running 31's on stock 15x7 rims.

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As far as I know, there are NO aftermarket rims with the 5-1/4" backspacing needed to run 31" tires with no trimming of flares and/or sheet metal. But -- Jeep used the 5-on-4/12" bolt circle wheels with the 5-1/4" backspacing for so many years and in so many styles that you should be able to find something in that configuration you can live with. Any aftermarket rims will have less backspacing. That means you won't need the WJ lower control arms ... but you will have to trim to avoid interference when you turn.
 
I'm confused by your comments regarding coil spacers. You shouldn't need anything to run 31s on Jeep rims. A 2-inch spacer will lift the front more than enough to remove the rake. I would suggest a 1-inch (or 3/4-inch, which I think is the more common size) rather than a 2-inch spacer.


It sounds like you know the idea of back spacing. My question is will my tires rub anywhere if I get 31in tires with this back spacing? They are a 15x7 rim. I have trimmed the fenders already for my Napier fender flares. ddf737fbac81d701de8047cee1fbe4ba.jpg9ef814fa036226c21967b1dd83682b6a.jpg8352e46b6970a78f9e6807ee12f7339c.jpg


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thanks again Pete. I'll be picking them up tomorrow....$80 bucks


Take a spare wheel to match and be sure. ‘98 LTD ZJ had optional 16” wheels. I had some on mine a long time ago with LT255/85r/16s which are 33/10/16.


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First Louey 1988 SB Sporttruck
4.0L/BA10/5 2wd (for now) 3.07 D35 235/75R/15 on steel wheels

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