34" Tires and Lift on '13 JKUR Stock Wheels?? - Jeep Wrangler Forum
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Old 08-25-2012, 11:23 PM   #1
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Talking 34" Tires and Lift on '13 JKUR Stock Wheels??

Hey Guys!

I'm waiting for my very first wrangler (4.1 Auto JKUR) to arrive and I want to swap the 32" BFG Mud Terrains to a longer lasting All Terrain (Rain, Pavement, Snow) that is between 33" and 35".

Ive read the tire sizing chart and my RPMs are a little high with the stock 32s anyway for a daily driver. Am I understanding it right that at cruising speed I will actually get higher gas mileage with a little bigger tire?

If I need a lift which I'm sure I will what do you think would be best? I've read all the threads and the 2.5" Tereflex got some good reviews.

Thanks for helping a newbie!

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Old 08-26-2012, 08:53 AM   #2
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Originally Posted by BrandonMSP View Post
Hey Guys!

I'm waiting for my very first wrangler (4.1 Auto JKUR) to arrive and I want to swap the 32" BFG Mud Terrains to a longer lasting All Terrain (Rain, Pavement, Snow) that is between 33" and 35".

Ive read the tire sizing chart and my RPMs are a little high with the stock 32s anyway for a daily driver. Am I understanding it right that at cruising speed I will actually get higher gas mileage with a little bigger tire?

If I need a lift which I'm sure I will what do you think would be best? I've read all the threads and the 2.5" Tereflex got some good reviews.

Thanks for helping a newbie!
Depending on how wide the aftermarket tires are, you'll probably need wheel spacers to run them w/out rubbing (a lift will handle any rubbing issues, height-wise).

You will NOT get better mileage running larger tires, due to weight and rolling resistance. In fact, your mileage will decrease significantly if you jump to 35" tires.

If you're gonna wheel your Jeep w/35's, you should gussets welded to the C's on your front axle. Personally, I recommend it even if you don't plan on wheeling. Up to you.

You'll need a beefier tire carrier or bumper/tire carrier combo to carry your spare.

Can't go wrong with the 2.5" TF.

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Old 08-26-2012, 11:54 PM   #3
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Thanks Kbwwolf! I appreciate your advice! I am going to drive it everyday to work so maybe I shouldnt go 35s...Bummer.

Below is the tire I am leaning towards since it has better on-road durability ~40,000 miles is what I've heard and its rated as Excellent in most categories in the Quadratec catalog. Can I drive this tire for a while if they mount it without spacers or lift until I can get into a garage for install of 2.5 TF and spacers? The dealer can set the computer for the spedo and such, right..or should I buy a Procal?

33X12.50R17LT Mickey Thompson MTZ
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Old 08-27-2012, 08:36 AM   #4
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Thanks Kbwwolf! I appreciate your advice! I am going to drive it everyday to work so maybe I shouldnt go 35s...Bummer.

Below is the tire I am leaning towards since it has better on-road durability ~40,000 miles is what I've heard and its rated as Excellent in most categories in the Quadratec catalog. Can I drive this tire for a while if they mount it without spacers or lift until I can get into a garage for install of 2.5 TF and spacers? The dealer can set the computer for the spedo and such, right..or should I buy a Procal?

33X12.50R17LT Mickey Thompson MTZ
If you mount that tire on stock rims (6.25" backspacing), you'll rub. Hard. You'll have to run wheel spacers (Spidertrax makes good ones) to use that wide a tire on your stock rims. You'd be much better off buying a tire/wheel combo that fits w/out the extra expense of spacers.

And the 17" tires will kill you on cost, which is why most folks go with smaller wheels, usually 15" or 16" (Mine are 16" only cuz DuraTrac doesn't make 35's in the 15" size). You'll save a ton of $$ with smaller wheels, and weight, as well.

If you decide to run the 17" MTZ on your stock rims (with wheel spacers, of course), you'll be okay height-wise, but only if you don't off-road very hard. Any situations calling for flex, or disco'd sway bars, and the 33's will hit your fenders.

Here's a great thread dealing with tire/wheel combos and how they work with various setups. It'll give you a better understanding of backspacing and why it's important, too: Largest tire on stock JK? Here's your answer!
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Old 09-02-2012, 02:05 PM   #5
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Not much to add, kbwolf is dead on.

You will want to replace the wheels. I really like the look of the new '13 black wheel. As mentioned, the backspacing of stock wheels is terrible. The priority is for the mall crawlers that don't want the tire sticking out and spraying mud/water all over the side. It makes sense if you stick with stock size tires, but once you go larger you need less backspacing.
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Old 09-04-2012, 10:36 PM   #6
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Ok I'm narrowing it down here thanks to you guys!

I like the Duratrac LT285/70R17 its 33" dia. 11.5" wide on the stock '13 rims. Just need to know what the smallest spacers I can get away with are and what the cost might be on a setup like this? Spacers$? Tires$?

I haven't decided on a lift yet. I may just go with a TF leveling kit, but that might be a month or two after I've drive it basically stock.

Like I said I'm not a hardcore off-roader yet. Basically a hunting truck, boat pulling rig, and will get me to my desk in the morning and back home at night.
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Old 09-04-2012, 10:51 PM   #7
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Maybe I misunderstood.. Is it a bad idea to keep the stock wheels?
I like the look and I feel like I might save a buck or two if I dont just have to buy new wheels and let the stockers sit in the garage or sell them.
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Old 09-04-2012, 10:55 PM   #8
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Maybe I misunderstood.. Is it a bad idea to keep the stock wheels?
I like the look and I feel like I might save a buck or two if I dont just have to buy new wheels and let the stockers sit in the garage or sell them.
The stock wheels have terrible backspacing, 6.5". You would be better off with wheels that have 4.5" or less so you won't have problems with rubbing. You could get spacers if you really like the stock wheels, but better off with aftermarket.
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Old 09-04-2012, 11:49 PM   #9
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Alright..if I have to. You are pretty good at convincing me to spend money suicideking!

Next to pick out a sweet set of wheels to go on some 33x12.5x15 Duratracs!

Any recommendations on this rig guys?
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Old 09-05-2012, 12:15 AM   #10
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Alright..if I have to. You are pretty good at convincing me to spend money suicideking!

Next to pick out a sweet set of wheels to go on some 33x12.5x15 Duratracs!

Any recommendations on this rig guys?
You don't HAVE TO, it just makes sense though. If you figure buying spacers vs. buying aftermarket and selling the stock wheels, you will come out ahead or break even with aftermarket.

Since you mentioned 33 x 12.5 x 15, you actually want even LESS backspacing than the 4.5". Since 15's need even less spacing, you will want to stick with something that is 3.75" BS.

The best part about 15's, is the tires are significantly less expensive than a 17" or even a 16". For example, I'm getting 35 X 12.5 X 15. The GY MTR in that size are almost exactly $100 less each compared to the 17". Plus, if you join Tread Lightly, you can get an additional $100 rebate on GY.

You're in luck though, because I just ordered my wheels, so researched pretty much all the wheels available. Unfortunately, once you go to 15" there aren't a lot of known wheels that will work. Checkout this thread I started regarding this exact subject:

Pics of 15's on 2012's

I put links to all of the wheels that are available on the discounttire site. There are more, see the list in the 2nd post.
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Old 09-06-2012, 09:21 PM   #11
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Thanks for the help. I cant decide on which wheel I like of those. I'm set on the Duratracs tho. I may just wait until I have the jeep and drive it for a while to decide what will look good and fit the look I'm going for. Every time I see a jeep I get excited and it amps up the anticipation. Only a few more weeks! Be sure to let us all know how you like those MTRs!
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Old 09-07-2012, 01:44 AM   #12
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Thanks for the help. I cant decide on which wheel I like of those. I'm set on the Duratracs tho. I may just wait until I have the jeep and drive it for a while to decide what will look good and fit the look I'm going for. Every time I see a jeep I get excited and it amps up the anticipation. Only a few more weeks! Be sure to let us all know how you like those MTRs!
Yeah, don't be in a hurry to get your wheels. Look at lots of pictures and go wheeling if you can. I must have changed my mind 10+ times before I settled on wheels.

You can't go wrong with the duratracs.

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