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Old 05-09-2015, 08:41 PM
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Largest wheel/tire for a 15 Rubicon

New to the jeep world, just picked up our first jeep 2015 Anvil Rubicon.

We will be using the Jeep to drive on the beach and want to go as wide as possibe with the tires to avoid having to deflate.

Does anyone know what the largest and widest tire size is that will work with a stock rubicon without rubbing? I know there are many factors so what i am looking for is "X is the largest tire size, it requires you to get a 20" rim with X backspacing"

Any help woud be appreciated!

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Old 05-09-2015, 08:53 PM   #2
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to the Forum..

Congrats on your new Rubicon.....

https://www.wranglerforum.com/f27/lar...er-142837.html

https://www.wranglerforum.com/f274/so...es-755625.html

^^^These Threads will help to answer your questions!!!!!!!!

Without a lift, or fender trimming, a 33" tire on a 8.0", 8.5", or a 9.0" wide wheel, with a 4.5 Back Spacing would be a good choice!!!!!!!!

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Old 05-09-2015, 09:06 PM
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Thanks. I read those a couple times.

I still do not seem to be able to determine what the max tire size would be. would a 305/65/18 work?
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Old 05-09-2015, 09:25 PM   #4
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A 285 is normally what is recommended without any MODS.
Going to a 305 may give you some rubbing issues. MODS such as leveling spacers, and or trimming fenders and air dam would be needed.

There are some on the Forum, that are running 305's with no lift. Maybe they will add some INFO to your question!
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Old 05-10-2015, 05:47 AM   #5
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Rim size does not matter as does tire diameter and width. From the link the OD provided:


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).


That plus 1" = 25.4 mm gives you the answer.
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Old 05-10-2015, 06:02 AM
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I plan I replacing the front bumper for a high clearance bumper so I am not worried about rubbing there. I am assuming the air dam is the plastic under the stock bumper? Don't mind cutting that.

Given these mods I am curious what everyone else is running. The link seems helpful to tell me what i can run stock without rubbing but not really helping with any guidelines about how big you can go with some minor mods. Unless I just don't get it which is highly possible as well...
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Old 05-10-2015, 06:13 AM   #7
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Congrats on the Rubicon

I would suggest a leveling kit with 33 x 1250 r 18 on a 18 x 10
It should still ride awesome and handle well on beach

Flat fender kit will allow for 35" tires

I have 18 x 10 XD Strike with -24 offset with no rubbing

I would be cautious on tire selection I have the trail grappler MT and they really like to dig in sand
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Old 05-10-2015, 08:59 AM
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Quote:
Originally Posted by pacec1 View Post
Congrats on the Rubicon

I would suggest a leveling kit with 33 x 1250 r 18 on a 18 x 10
It should still ride awesome and handle well on beach

Flat fender kit will allow for 35" tires

I have 18 x 10 XD Strike with -24 offset with no rubbing

I would be cautious on tire selection I have the trail grappler MT and they really like to dig in sand
Thanks! Any pictures of your setup?

In looking at the build forums I am kind of leaning towards 35's and a 2.5 lift
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Old 05-10-2015, 09:47 AM   #9
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I used to live Provincetown, Cape Cod Massachusetts and took my YJ to the beach all the time.



Air down.

You'll need to. A YJ weighs about a billion times less than a JK and I once tried going out not aired down. After all, I had 10.5" tires, so that that should be far wider than any stock rig that had aired down.

Nope, it doesn't work. Of course, it does work some, but it is better aired down. If you hit any sort of hill and dig it you'll leave ruts for all the other rigs. Don't be that guy.

Air down.
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Old 05-10-2015, 11:18 AM   #10
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Originally Posted by NotThePainter View Post
After all, I had 10.5" tires, so that that should be far wider than any stock rig that had aired down.
I mean 12.5"

I had 10.5" on my TJ and certainly needed to air down on that.

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