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Unread 08-23-2014, 02:59 PM   #1
bekahsjeep
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will 285/75/16 fit at stock height

We just picked up a set of 285/75/16 falken wild peak at02 tires on 1 6x8 KMC XD 122 Enduro wheels with a 4.5 back space. Looks like it would be close but before we add them I wanted to make sure I know on stock wheels they wont

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Unread 08-23-2014, 04:30 PM   #2
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Since your profile is empty, knowing what you intend to mount these on might be very helpful...
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Unread 08-23-2014, 05:21 PM   #3
bekahsjeep
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Originally Posted by Hungus View Post
Since your profile is empty, knowing what you intend to mount these on might be very helpful...
I'm sorry I figured since this was the tj forum that would be good enough. 98 tj with a 4.0 manual stock height on 235 15s.
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Unread 08-23-2014, 05:31 PM   #4
jjvw
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They will rub the fenders. If you are intent on running them, you really ought to extend your bump stops 2.5 - 3" in order to limit the suspension, but that will leave you with very little up travel. It's a bad idea, even for the street.

FWIW, the largest size tire that properly fits on stock TJ suspension is a 31" and that can be pushing it under some circumstances.
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Unread 08-23-2014, 05:45 PM   #5
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Quote:
Originally Posted by bekahsjeep View Post
I'm sorry I figured since this was the tj forum that would be good enough. 98 tj with a 4.0 manual stock height on 235 15s.
what is your definition of "fit"? believe it or not, its different for a lot of people.

do you want the tires to look big while the Jeep is parked at the tire shop?

or do you want to be able to drive down the road/highway and hit normal bumps, navigate tight parking lots, etc?

some people just want stuff to "fit", others actually want stuff to "work".
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Unread 08-23-2014, 05:46 PM   #6
bekahsjeep
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Originally Posted by jjvw View Post
They will rub the fenders. If you are intent on running them, you really ought to extend your bump stops 2.5 - 3" in order to limit the suspension, but that will leave you with very little up travel. It's a bad idea, even for the street.

FWIW, the largest size tire that properly fits on stock TJ suspension is a 31" and that can be pushing it under some circumstances.
The plan is to put a rough country 3.25 on or possibly a 2 in bb. I have no desire to do a bl. I was just curious about running them for a little bit til the lift gets here next week. Does the 3.25 come with everything I need or do I need to worry about extending other things out?
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Unread 08-23-2014, 05:48 PM   #7
bekahsjeep
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Originally Posted by Unlimited04 View Post

what is your definition of "fit"? believe it or not, its different for lots of people. some people just want stuff to "fit", others actually want stuff to "work".

do you want them to look cool while the Jeep is parked at the tire shop?

or do you want to be able to drive down the road/highway and hit bumps, go around corners, etc?
The question was can I run them at all on the street just til I can get the lift on. I know you cannot stock but these are spaced. I was just curious because I'd like to get them on thank you.
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Unread 08-23-2014, 05:51 PM   #8
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Wait until the lift. Minimum total lift for those tires is 3.25". That should maintain the stock up travel with minimal bump stop extension. Although, a full 4" of lift is considered preferable.

What axle gearing do you have? That also matters. 4.10 works with the 5 speed, but 4.56 is better.

Whatever you do, pay attention to Unlimited.
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Unread 08-23-2014, 05:55 PM   #9
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Originally Posted by bekahsjeep View Post
The question was can I run them at all on the street just til I can get the lift on. I know you cannot stock but these are spaced. I was just curious because I'd like to get them on thank you.
those are 33" tires.

33's are fit in two common ways on TJ's:

1. 4" suspension lift, with 2" bumpstop extensions in front and 2-2.5" in the rear. Requires a SYE/CV shaft.
2. 2.5" suspension lift, with a 1.25" body lift, with 1-1.25" bumpstop extensions in front and 1.25-1.5" in the rear. The 1.25" BL usually accompanies a 1" Motor Mount Lift to offset some of the driveline angles.

Either way you go, figure on some or many of the following components: longer front brake lines, extended sway bar links front and rear, gears, brake and steering upgrades to accommodate larger tires, SYE, CV shaft, bumpstop extensions, new shocks, adjustable track bars, and a rear track bar bracket.
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Unread 08-23-2014, 06:20 PM   #10
bekahsjeep
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Quote:
Originally Posted by Unlimited04 View Post

those are 33" tires.

33's are fit in two common ways on TJ's:

1. 4" suspension lift, with 2" bumpstop extensions in front and 2-2.5" in the rear. Requires a SYE/CV shaft.
2. 2.5" suspension lift, with a 1.25" body lift, with 1-1.25" bumpstop extensions in front and 1.25-1.5" in the rear. The 1.25" BL usually accompanies a 1" Motor Mount Lift to offset some of the driveline angles.

Either way you go, figure on some or many of the following components: longer front brake lines, extended sway bar links front and rear, gears, brake and steering upgrades to accommodate larger tires, SYE, CV shaft, bumpstop extensions, new shocks, adjustable track bars, and a rear track bar bracket.
really I thought they measured out to 32x11.25. What is the sye? Mainly this jeep is a dd with light off road on the farm.
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Unread 08-23-2014, 06:42 PM   #11
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Do Falkens run that small? 285/75r16 = 32.8 x 11.22" according to a tire size calculator and are commonly referred to as a 33" tire. However, my Duratracs of that same size are closer to 32.5" diameter according to my tape measure. Listed tire sizes are rarely accurate.

SYE stands for Slip Yoke Eliminator and is a modification to the NV231 transfer case to allow for a double cardan (aka CV) rear drive shaft which in turn allows for steeper drive shaft angles to the rear axle. This is needed for taller spring lifts, generally exceeding 3".

In short, there are many things to consider when installing an increasingly taller lift and an increasingly larger tire size. And it is advisable to pay attention to the actual numbers involved. The people worth listening to will never tell you run what you are specifically asking about. However, they will tell you what is needed to properly run a given tire size.
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Unread 08-23-2014, 07:24 PM   #12
bekahsjeep
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Quote:
Originally Posted by jjvw View Post
Do Falkens run that small? 285/75r16 = 32.8 x 11.22" according to a tire size calculator and are commonly referred to as a 33" tire. However, my Duratracs of that same size are closer to 32.5" diameter according to my tape measure. Listed tire sizes are rarely accurate.

SYE stands for Slip Yoke Eliminator and is a modification to the NV231 transfer case to allow for a double cardan (aka CV) rear drive shaft which in turn allows for steeper drive shaft angles to the rear axle. This is needed for taller spring lifts, generally exceeding 3".

In short, there are many things to consider when installing an increasingly taller lift and an increasingly larger tire size. And it is advisable to pay attention to the actual numbers involved. The people worth listening to will never tell you run what you are specifically asking about. However, they will tell you what is needed to properly run a given tire size.
I agree and I thank the veterans that learned all of this the hard way. I wanted to run this size to kinda avoid getting to extensive into it. I was going to go with 31s but I got this set up for half of new cost and it's only 3 months old so beggers can't be choosers lol. Alot of the mod budget goes into my husband's truck so I'm trying to do my own with the jeep lol.

So the rough country 3.25 will not be enough to work properly?
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Unread 08-23-2014, 07:35 PM   #13
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Not to tread jack but what about 265 70 r18?
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Unread 08-23-2014, 07:38 PM   #14
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Quote:
Originally Posted by bekahsjeep View Post
...
So the rough country 3.25 will not be enough to work properly?
If it really provides 3.25", then you will be at the absolute bare minimum for a 32.5" tire. Actual lift height is based on the weight of the Jeep. FWIW, I am running 2” of spring plus 1.25" of body lift totaling 3.25" of total lift. These are real measurements, not advertised lift. Still, many will say it is too little for my tires.

You still need to consider your axle gearing. If it is too low for the larger tires, the Jeep will feel sluggish and won't do well on the highway.
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Unread 08-23-2014, 07:39 PM   #15
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Not to tread jack but what about 265 70 r18?
What is the converted the size in inches?
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