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So I have a 2013 JK that's all stock. I have no real idea when it comes to specs on wheels and tires and what will fit/work. I don't want to void the warranty so a lift isn't possible right now. Will General Grabber AT2 33x12.5R15LT with 52 Rockcrawler Series wheels work?
 

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Check with the Dealer first!

I took my wife's Jeep and had everything done at the dealer. I paid the extra money to have the "stock" ride. They installed a 4" lift and I bought the largest tires that they Jeep Dodge would allow. The tires are 32". Some dealers may allow you to go hire, I am not sure. All is still under warranty and the do an inspection and re-torque as needed every other oil change for $50. I think it is worth it. Here are the before and after pictures.
 

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Lengthy but good read

I copied this from another thread
Largest tire on stock JK? Here's your answer!
One of the most frequently asked questions on this forum is “What's the largest tire I can fit on my stock/unlifted 07+ JK?”. So, I put this post together that can either be made a sticky, or something that we can link to whenever this question arises.

Have to give thanks to kbwwolf for proof-reading and making a few tweaks here and there. Thanks bro!

First things first. Jeeps come stock with 3 different tire sizes:
1. 225/75/16 (29”x9”)
2. 255/75/17 (32”x10”)
3. 255/70/18 (32”x10”).

The backspacing on stock JK wheels is 6.25". That means that the mounting surface of the wheel is 6.25” from the rear lip of the wheel. The larger the backspace number, the further under the fender (and closer to suspension components and airdam) the wheel will be. (see below image)


I see posts all the time saying that a 33” tire will fit the stock JK just fine, and that is semi-true. In reality, this question requires a 2 part answer. The first part deals with tire diameter. The second part deals with width.

It is true that the largest diameter tire you can fit on a stock JK without issue (read on) is 33” in diameter. With this diameter, you shouldn’t have any issues on the street. However, you could get some contact with your fenders if you flex offroad. Disconnecting your front sway bar will cause contact with your fenders.

Now let’s take a look at tire width. People often overlook this aspect when choosing a tire. The width on most 33's range from 10” – 12.5”+.

On Stock Wheels
The largest tire you can fit without a chance of problems on road is a 33x10 tire (also called a “pizza cutter”). An example is the 255/80/17 BFG KM2. Because this tire is the same width as most stock JK tires, there is no issue on road, despite the larger diameter. You can run this size without issue.

Now, let’s consider some tires that could potentially cause slight issues on road; the 33x11s. The common sizes of these would be 285/75/16, 285/70/17, and 275/70/18.

The 275/70/18 measures slightly under 11” wide, while the other two measure a little over. Many folks have reported running these sizes without issue. However, others have experienced contact with the airdam or front suspension components. Simple fixes are to add washers to the steering stops, trim the airdam, or install wheel spacers.

Any tire larger than 11” in width, you are almost guaranteed to have to do one of the above mentioned mods. In fact, if you go too much wider than the 11” tire on stock wheels, you stand a good chance of making contact with your rear swaybar end link. If that is the case, wheel spacers can correct this issue. Common sizes are 295/70/17 (33x11.6), 305/60/17 (33x12), 305/70/16 (33x12), 295/65/18 (33x11.6).

On Aftermarket Wheels
As I mentioned initially, the stock wheels have a backspacing of 6.25”. This is too deep of a backspace to allow proper clearance for a decently wide tire. The general consensus is that the “magic number” for backspacing for the JK is 4.5” or less. It does not mean you can't run a wheel with 4.6”+. But 4.5” and under is the safest bet.

Many 15” wheels have less (sometimes a lot less) than 4.5”. That's so the wheel clears the brake calipers. Most 15” wheels come with 3.75” of backspacing (MB72, MB TKO, etc). There are a few that come with more (such as the Black Rock 909 – 4”) and some that come with less (such as the Level 8 Tracker – 3.32”). Just remember, the lower the backspace number, the further out the wheel will sit from the Jeep body. One of the most common wheel/tire combos on this site is the 15x8 MB 72 wheel with 33x12.5x15 Duratrac tires. Dozens of people run this setup without a single issue on the street. However, just like most of the other 33” combinations, you can get some fender contact when offroad.

Also, be aware that, while many 15" alloy wheels will fit over the Wrangler's brake calipers, most 15" steel wheels will not.

Once you get into 16”+ wheels, it's pretty easy to select a wheel with a backspace near 4.5”. The most common 33” tire to run with 16” aftermarket wheel is the 285/75/16. A common tire size for the 17” wheel is the 285/70/17.

Links of interest:
Utility to compare tire sizes
Adding washers to the steering stops
 

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Awesome breakdown on tires! Is there a better brand of wheel spacers to buy? I have 265/70/17s now and will be getting some 285/70/17s. Is an 1-1/2" spacer enough?
 

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So I have a 2013 JK that's all stock. I have no real idea when it comes to specs on wheels and tires and what will fit/work. I don't want to void the warranty so a lift isn't possible right now. Will General Grabber AT2 33x12.5R15LT with 52 Rockcrawler Series wheels work?
It looks like you have selected a 15" steel wheel, and this is likely a problem. Most 15" steel wheels do not fit on our JK's. You can select a 15" aluminum wheel but even some of those are an issue, but you can have success with some of the Level 8 or MB wheels from Discount Tire.

You would be much better served by going up to a 16" wheel if you want to stay with steel. Then select a 305/70-16 tire to get a 33" that is 12" wide... There are a ton of cool tire choices in this size, including the AT2's.

Here it is in Duratrac's:



I'll add that while you shouldn't have rubbing during normal operation, it is possible that you will rub while off roading. Every Jeep is a little different, so it's hard to guarantee clearance. I'd say that 33's look awesome with a leveling kit like the TF 1.5 spacer kit. Or even a 1" front Teraflex puck would give you more clearance and a great look.


Awesome breakdown on tires! Is there a better brand of wheel spacers to buy? I have 265/70/17s now and will be getting some 285/70/17s. Is an 1-1/2" spacer enough?
Yes, the 1.5 wheel spacer is enough to run all the way up to the 12.5" tires, so plenty for 285's.

I recommend the RedRock 4x4 spacers from Extreme Terrain. Great specs and a great price too.

http://www.extremeterrain.com/redrock-4x4-15in-wheelspacers-jk-j100749.html


*
 

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x2. Although some do use 15" rims it's cutting close and not worth on a JK as it was on older generation Jeeps that were smaller and harder to install large tires.
 

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when you buy your wheels go with 16s or 17s with at least 4.5 backspacing.
 

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I agree with the above and personnally think that 15s just look wrong on a big JK. I would go 17 smallest.

IMO....
The rim should be roughly 1/2 of the overall tire size for best appearance.
A 29/31 tire = 15 in rim
31/33 tire = 16 in rim
33/35 tire = 17 in rim
and so on. Like I stated tho', it's strictly my opinion. If the rim is too small it becomes Donut looking and if it is too big it becomes too pizza cutter anemic looking. Plus in both cases you could possibly run into some form of sidewall problem. Plus on the 15 inch wheels you can run into fitting problems. And the 18 inch up I find to have less selection and are more costly
 

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Awesome breakdown on tires! Is there a better brand of wheel spacers to buy? I have 265/70/17s now and will be getting some 285/70/17s. Is an 1-1/2" spacer enough?
I


f you're going to buy rims just make sure they have at least 4.5 BS and you shouldn't need spacers
 
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