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Old 03-17-2010, 03:35 PM   #1
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Need wheel/tire advice

Hello everyone! New to community and if I knew you existed sooner, would have been here then! I have a 1998 Wrangler, stock, nothing special and am looking to change that. What came with the vehicle is 20575R15's on stock rims w/bolt pattern 5x4.5

Can someone advise me how big I can safely go on just tires and then how big rims/tires without doing a major overhaul to stock item and safety?

I have a feeling I need to change a lot to make her look like the rest of the jeeps I envy her to be...but I need a starting point. All advise is welcomed

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Old 03-17-2010, 03:51 PM   #2
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Can go up to 31" tire on stock suspension get a little rub if are flexing though if are thinking eventually wanna go to a 33 or 35 might consider going to a 16" wheel for more tire choices, but nothing wrong with sticking with a 15.

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Old 03-17-2010, 04:29 PM   #3
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Hturner! Thanks for answering me. I have been to numerous tire/wheel locations online and get so confused when they starting talking all kinds of dimensions and measurements. So if I want to get rid of the lame wheels, I can go up to 16" without changing anything else or does something else need to be modified? My neighbor just took her older jeep and added a lift and these huge tires...with no spacers. I know very little about this part of Jeep ownership, but when do spacers play a part?
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Old 03-17-2010, 06:06 PM   #4
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Ive got a 2002 sport and i am running 32x11.5s on 15x8s on a stock suspension. Ive never had any problems rubbing even on tight turns. I have put 1.25 inch spidertrax wheelspacers on to give me a little more room and a wider stance
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Old 03-17-2010, 08:56 PM   #5
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if your not looking to go crazy, go for a Budget Boost and that will give you you new shocks, coil spacers and the ability to clear 31's and have plenty of room for flex on a trail. anything over about 3'' or 4'' of lift and transfer case drops and driveline angles start to become necessary to keep proper geometry.
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Old 03-17-2010, 09:06 PM   #6
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For a TJ, my favorite setup is 2.5-3" lift. 15" rims. 33" MT's. Buy some new rims and get the correct backspacing (no need for spacers then)

the setup looks AWESOME.

If your low on cash, or want a little less agressive look, get 31" MT's, a few wheel spacers, and call it a day
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Old 03-19-2010, 07:28 PM   #7
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thanks for all the advice, at least now I have a starting point
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Old 03-19-2010, 07:53 PM   #8
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Look through picture threads here and get an idea for what you like, look wise. Then consider what you need ability wise and go from there. No sense spending money on stuff you don't need/use or decide 6 months later you want to change. Wheels and tires are easy, but not inexpensive... Same with lifting it. Get a feel for how you use your Jeep, then mod away...
You can clear 31's easy on stock rims, add a couple of inches of lift and 32's or 33's will clear, but to go wider than 10.5" you need different wheels or spacers. Personally, 15" rims are less expensive to put tires on and there are more tires available in 15's I believe. Most truck tires are sized in inches not metric, so consider that you now have roughly 27x8x15's on there now. 31's will seem huge... But keep in mind too that different tires run different sizes even tho they all say they are the same size... My 33's measure a tad over 32" iirc.
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Old 03-19-2010, 11:02 PM   #9
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Just curious as to what engine you have? I have the 4 banger in mine and it now has 265 75 R 15 (I think thats a 31"). They don't rub at all however I lost quite a bit of power. I don't plan on a re gear and I am thinking about going back to a little smaller tire. My jeep had those tires on it when I bought it and last weekend I switched out with a buddy of mine who had some 225 75 15's and I couldn't believe how much better that little thing ran. Now I am not sure what to do because I love the looks of the bigger tires (and the rims I own) but it is way out of its power range with the bigger tires.
When I'm running 55 mph down the road it is only turning about 1800 rps so if I need to pass somebody or if I come up to an incline it is struggling. When I put the smaller tires on it now cruises at about 2500 rpm. It is not a powerhouse by no means but it won't come to stop on a hill and I can pass people if I need to.

If you have the 6 cyl forget all I just said.
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Old 03-20-2010, 08:48 AM   #10
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^^^ Good point! You also need to consider your gears.... and where you are doing most of your driving.... You will loose power with larger tires, period. If you are driving up hills all day long then you will likely hate it, without regearing, and having gears done will run somewhere in the neighborhood of $1200 +....
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Old 03-24-2010, 07:48 PM   #11
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Okay Inferno girl & flyin-low, great input. I have a lil four cyl and not looking to make my jeep into a rock climber at this point, tho I hear it's fun and definitely not looking for any gear mods. My latest disappointment is I have measured the rims on the vehicle and looked at the sticker on the inside door...the rims are 15 x 6...I have the 205 75r 15 on the jeep, same ones that came with it when i bought it, but funny, flyin-low, the spare is a 225 75r 15. Yeah, I want a little height but I also want a little wider tire. This is where I have to admit more stupidity or lack of knowledge, but with these little size 6 rims, how big/wide can I go on a tire? OR can I buy new rims, say 7 or 8 size without a fit problem on the vehicle or am I stuck with the 6's? My husband has a 1999 Sahara, running with 225 75r 15 tires and they look huge, width and height wise, compared to mine. Without going out there and trying to measure, I am assuming the rims aren't 6's?
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Old 03-24-2010, 10:52 PM   #12
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You can buy 8" wide wheels and go up to a 12.5" wide tire with proper backspacing. Keep in mind that bigger tires and heavier wheels will be a drain on your power. Tons of us run Cragar Soft 8's, they are heavy since they're steel, but cheap at Jegs, or Summitracing, etc. About 40 bucks apiece.
If you stay with your stock rims and they are only 6" wide then you probably can only go up to a 9.5" wide tire.
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Old 03-25-2010, 03:29 PM   #13
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39s on 5.5" lift here.


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