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Old 03-29-2012, 09:16 AM   #1
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Rubicon BFGoodrich Mud Terrain Tire Pressure / Rotation

TIRE PRESSURE QUESTION: I just got a Rubicon yesterday and I am wondering what everyone is running there pressure at for them On Road and aired down Off Road. I know in the ESP Duratrac thread people were saying that they were getting those tires shipped at the "recommended pressure" and it was too high. That got me wondering if I should air down a bit. Anyone do a chalk test with them to see what pressure works the best?

TIRE ROTATION QUESTION: How often do you recommend rotate them.
NOTE: G is the proper way below, F is for FWD
Quote:
Originally Posted by OatmountainAl View Post
For those who got just as confused as I did...




Quote:
Originally Posted by daggo66
spare to rr, rr to fr, fr to rl, rl to fl, fl to spare




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Old 03-29-2012, 09:20 AM   #2
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I've never seen a diagram that rotated the spare in, is that correct?

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Old 03-29-2012, 09:21 AM   #3
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Inside your door will tell you to run them at 37. I've got 50+K and counting on mine keeping them at 37 and doing a 5 tire rotation every 6k.

Off road PSI will depend on the terrain. In the sand I go down to 15 PSI with good results.

Remember, the Duratracs you are readiing about are not stock tires nor stock sizes.
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Old 03-29-2012, 09:27 AM   #4
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Quote:
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I've never seen a diagram that rotated the spare in, is that correct?
Really? Yes, that is correct. It should be right on the paperwork you received for your tire warranty. You should always rotate the spare in when you have a full size spare. You will gain 20% more tread life. Anyone planning on keeping the spare should remember that tires have a shelf life as well as a tread life. Use it or lose it.
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Old 03-29-2012, 10:08 AM   #5
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I saw this in the owners manual though, but it seems like total BS to me --

Full Size Spare – If Equipped
The full size spare is for temporary emergency use only.
This tire may look like the original equipped tire on the
front or rear axle of your vehicle, but it is not.
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Old 03-29-2012, 10:12 AM   #6
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Well shoot in that case I guess Iv goten lucky becouse my spair probly has about 20k on it
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Old 03-29-2012, 10:25 AM   #7
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Quote:
Originally Posted by snikt View Post
I saw this in the owners manual though, but it seems like total BS to me --

Full Size Spare – If Equipped
The full size spare is for temporary emergency use only.
This tire may look like the original equipped tire on the
front or rear axle of your vehicle, but it is not.
Mine doesn't have that. It does have this, however:

Tires and the spare tire should be replaced after six
years, regardless of the remaining tread. Failure to
follow this warning can result in sudden tire failure.
You could lose control and have an accident resulting
in serious injury or death.
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Old 03-29-2012, 10:27 AM   #8
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What daggo66 says ....

The manufacturer of all of our vehicles don't spend millions in research and engineering just to randomly pick a PSI for tires and weight for GVWR.
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Old 03-29-2012, 03:10 PM   #9
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Thanks Daggo66 - Question Solved

Thanks for the quick response man, I totally respect your opinion
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Old 03-29-2012, 03:16 PM   #10
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"G" in the above diagram is the correct tire rotation for a 5-tire rotation.

The spare goes to Right Rear.
Left Front goes to Spare.
Right Front goes to Left Rear.
Left Rear goes straight forward to Left Front
Right Rear goes straight forward to Right Front.


Pressure depends on weight of the vehicle and tire size. For my 35" BFG KM2 tires I run them @ 28 psi on the street and air down to 15-16 psi off-road.

I rotate at every 5k mile LOF service.

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Old 03-29-2012, 03:59 PM   #11
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I've got 66k on my BFG KM's doing the 5 tire rotation every 5k (G). I run mine at 38psi in the summer and drop to 30psi (or less) in winter. I may get 85k or more from these mud tires doing the rotations, before I'm to the wear bars......
Anything over 40psi and you'll feel the harshness in the ride....and probably wear out the centers.
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Old 03-29-2012, 04:54 PM   #12
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Again, size of tire and weight are going to be the determining factors. The OP should list what size and weight of rig and we can get him pretty close on pressures.

I also like to chalk my tires after setting pressure to get a final look at tire pattern.

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Old 03-29-2012, 05:20 PM   #13
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Quote:
Originally Posted by zmotorsports
"G" in the above diagram is the correct tire rotation for a 5-tire rotation.

The spare goes to Right Rear.
Left Front goes to Spare.
Right Front goes to Left Rear.
Left Rear goes straight forward to Left Front
Right Rear goes straight forward to Right Front.

Pressure depends on weight of the vehicle and tire size. For my 35" BFG KM2 tires I run them @ 28 psi on the street and air down to 15-16 psi off-road.

I rotate at every 5k mile LOF service.

Mike.
28 is where I have mine now. Its perfect!!
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Old 03-29-2012, 05:22 PM   #14
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Quote:
Originally Posted by daggo66 View Post
Mine doesn't have that. It does have this, however:

Tires and the spare tire should be replaced after six
years, regardless of the remaining tread. Failure to
follow this warning can result in sudden tire failure.
You could lose control and have an accident resulting
in serious injury or death.
For a bad guy you are helpful and informative!

Kudos to you, sir.
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Old 03-29-2012, 06:20 PM   #15
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Quote:
Originally Posted by zmotorsports View Post
Again, size of tire and weight are going to be the determining factors. The OP should list what size and weight of rig and we can get him pretty close on pressures.
OR, since he has a stock rig with stock tires, just look at the door sticker. Otherwise you are absolutely correct.
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Old 03-29-2012, 07:54 PM   #16
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Just an FYI that doesn't apply to Jeeps - most cars now run directional tires, so the "forward cross" for front wheel drive vehicles is no longer recommended.

Directional tires can only be swapped front to back on the same side. This will be the recommendation for FWD, RWD or AWD/4WD with directional tires unless your car has larger rear tires (typical only on RWD or the high end "sporty" SUV's).
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Old 03-29-2012, 10:45 PM   #17
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Talking Thanks for the input

Quote:
Originally Posted by zmotorsports View Post
Again, size of tire and weight are going to be the determining factors. The OP should list what size and weight of rig and we can get him pretty close on pressures.

I also like to chalk my tires after setting pressure to get a final look at tire pattern.

Mike.
It's just a bone stock 2 Door JK Rubicon.

Quote:
Originally Posted by Jurhip View Post
Just an FYI that doesn't apply to Jeeps - most cars now run directional tires, so the "forward cross" for front wheel drive vehicles is no longer recommended.

Directional tires can only be swapped front to back on the same side. This will be the recommendation for FWD, RWD or AWD/4WD with directional tires unless your car has larger rear tires (typical only on RWD or the high end "sporty" SUV's).
I actually just lifted the photo from another post. The Forward Cross "F" is not the way to go with these tires or any Jeep unless they start coming in FWD. (Maybe the 2WD Unlimited's are FWD? ) That Forward Cross picture just happens to be attached to the proper way in the second picture as noted. It probably was made by some tire company originally. The Reward Cross in the second picture "G" is the way you want to go with the stock Rubicon tires (as the thread ask about), or as you pointed out non-directional tires for 4WD. The reason stated for this configuration in that other post was that the rear right tire gets the most torque. So you want to use the freshest tire to that position.

Quote:
Originally Posted by krutj View Post
I've got 66k on my BFG KM's doing the 5 tire rotation every 5k (G). I run mine at 38psi in the summer and drop to 30psi (or less) in winter. I may get 85k or more from these mud tires doing the rotations, before I'm to the wear bars......
Anything over 40psi and you'll feel the harshness in the ride....and probably wear out the centers.
Are you airing down in winter as a way to get better traction in crappy conditions. Or do they heat up and expand, and it is a matter of physics even with clear roads. I'm pretty new to all this stuff.
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Old 03-30-2012, 05:37 AM   #18
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Quote:
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Are you airing down in winter as a way to get better traction in crappy conditions. Or do they heat up and expand, and it is a matter of physics even with clear roads. I'm pretty new to all this stuff.
Yes, for better traction....
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Old 03-30-2012, 07:15 AM   #19
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Quote:
Originally Posted by Jurhip
Just an FYI that doesn't apply to Jeeps - most cars now run directional tires, so the "forward cross" for front wheel drive vehicles is no longer recommended.

Directional tires can only be swapped front to back on the same side. This will be the recommendation for FWD, RWD or AWD/4WD with directional tires unless your car has larger rear tires (typical only on RWD or the high end "sporty" SUV's).
This is what I was told by two different tire shops
Rotate the spare in rotation on one side only
Left rear to left front left front to left rear
Right rear to right front, right front to spare
And spare to right rear. Every 6K miles
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Old 03-30-2012, 07:28 AM   #20
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Both shops are completely wrong for a Wrangler.
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Old 03-30-2012, 08:18 AM   #21
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Quote:
Originally Posted by Jurhip View Post
Just an FYI that doesn't apply to Jeeps - most cars now run directional tires, so the "forward cross" for front wheel drive vehicles is no longer recommended.

Directional tires can only be swapped front to back on the same side. This will be the recommendation for FWD, RWD or AWD/4WD with directional tires unless your car has larger rear tires (typical only on RWD or the high end "sporty" SUV's).
This is correct IF they are directional tires only. I definately wouldn't say "most cars" though. There are some but most are still coming from the OEM with non-directional tires until you get into higher end luxury and sport cars.

Quote:
Originally Posted by OutlawJK View Post
This is what I was told by two different tire shops
Rotate the spare in rotation on one side only
Left rear to left front left front to left rear
Right rear to right front, right front to spare
And spare to right rear. Every 6K miles
Both tires shops are incorrect. Non-directional tires should be rotated in a cross pattern front to rear depending on whether the vehicle is front wheel drive (FWD) or rear wheel drive (RWD). All wheel drive (AWD) and four wheel drive (4WD) vehicles fall under the category of RWD as far as pattern.

On a side note, in my opinion the fact that tires ARE rotated is more important to longevity and life of the tires than what pattern they are rotated in. It seems all tires if left too long in the front position on a vehicle will develop some form of irregular wear. The purpose of rotating the tire positions is to get those front tires onto the rear to "square" the surface back up and keep the irregular wear pattern from grabbing hold. Once an irregular pattern develops it is very difficult and takes much longer to correct than not letting it get too noticeable to begin with.

Personally I do a 5-tire rotation in the rear crossing pattern but if someone merely swapped front to rear it is better than not rotating at all.

Mike.
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Old 03-30-2012, 10:51 AM   #22
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Both shops are completely wrong for a Wrangler.

prove it
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Old 03-31-2012, 12:53 AM   #23
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prove it
I'd say they're wrong for any vehicle.

Say you follow that pattern and rotate the left front and rear back and forth, and the right front and rear and the spare rotate with each other.

If you rotate them every 5000 miles (or any other distance, as long as you do the same number of miles between each rotation), after 30000 miles of driving you have 2 tires with 30000 miles on them and 3 tires with 20000 mi on them; a difference of 10000 miles. That's going to cause a not-insignificant difference in tire diameter from one side to the other. This is going to cause the diffs to be constantly working, resulting in increased fluid temps and wear on the spider gears, especially if you do a lot of high-speed highway driving.

All of the tires (temp use spares excluded) on any vehicle should spend the same amount of time on the road.
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Old 04-02-2012, 10:22 AM   #24
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great thread. found it when looking for tire pressure for stock Rubi tires. i just bought a set of Rubi wheels/tires used for my 08 JKU. the spare has never been used. the ones i put on the front look to have about 40% and the rear has about 50%+. Anyway i could start getting some use out of this spare. it has 100%. If i rotate them in this way what issues may i run in to since the spare has never been used?
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Old 04-02-2012, 10:42 AM   #25
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Quote:
Originally Posted by C1ph3r View Post
great thread. found it when looking for tire pressure for stock Rubi tires. i just bought a set of Rubi wheels/tires used for my 08 JKU. the spare has never been used. the ones i put on the front look to have about 40% and the rear has about 50%+. Anyway i could start getting some use out of this spare. it has 100%. If i rotate them in this way what issues may i run in to since the spare has never been used?
You could possibly have some issues with it pulling to one side as the circumference is going to be different. If you are running LSDs in your axles I would not do it, otherwise it shouldn't hurt anything. Lockers can be effected but that would only come into play when wheeling.

When you wear them and get new make sure to do a 5-tire rotation from the get go and then no issues at all.

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Old 04-02-2012, 12:52 PM   #26
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Thanks Mike. No i dont have lockers or an LSD. Could a tire shop cut them down? Sorry for the thread jack.
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Old 04-02-2012, 01:12 PM   #27
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Thanks Mike. No i dont have lockers or an LSD. Could a tire shop cut them down? Sorry for the thread jack.
Give that new Rubi tire to me and I'll give you a used one.
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Old 04-02-2012, 02:25 PM   #28
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OK, what psi for a 285/75-16 Duratrac???
The shop had 76psi in them they are 80psi Max.
I got 40psi in them now.
Thanks
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Old 04-03-2012, 05:56 AM   #29
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For some reason I thought you never change direction on any steel belted radial tire and didn't think any new car came w/anything but.
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Old 04-03-2012, 06:51 AM   #30
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OK, what psi for a 285/75-16 Duratrac???
The shop had 76psi in them they are 80psi Max.
I got 40psi in them now.
Thanks
Never go by the sidewall. It all depends on what vehicle the tires are on. Google "tire chalk test".

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