Rubicon Wheel Tire Pressure

RubiconGaby

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My 2 door drives like a sorta bad sports car. But I love it! Traded perhaps the worlds best steering sports car to get the Jeep, though.. so take my comment for what it’s worth.
Did you swap a Cayman for it?





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Paluss

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running 39 in all four wheels, dealer filled with with nitro had my Rubicon since April and pressure has not changed at all, I used to think nitro was a waste but so far so good, waiting to colder temps to see if it still is spot on...
 

WranglerMan

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running 39 in all four wheels, dealer filled with with nitro had my Rubicon since April and pressure has not changed at all, I used to think nitro was a waste but so far so good, waiting to colder temps to see if it still is spot on...
39 seems pretty high, I would guess running the pressure that high you are riding on the crown of the tire and not much contact on the road, my suggestion is to set them 32-34 and then do a chalk test to see where you are, you can always air down if needed going off road
 

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Ive been at 37 all around except when pulling a trailer - then I run 47 in the rear. I might try dropping them a bit just to see if it is a ride improvement.
 

Rhinebeck01

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@Godzilla

Curious why would you think you need to up your rear tire pressure when towing from 37# psi, or less to 47#. Looking forward to your explaining why you would do this...
 

Paluss

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39 seems pretty high, I would guess running the pressure that high you are riding on the crown of the tire and not much contact on the road, my suggestion is to set them 32-34 and then do a chalk test to see where you are, you can always air down if needed going off road
thanks for the tip, never checked the owners manual for recommended pressures, going to drop them down to 37
 

WranglerMan

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thanks for the tip, never checked the owners manual for recommended pressures, going to drop them down to 37
I ran the stock 18’s on my Sahara 275/70R18’s at 32 and the ride was pretty smooth so 37# although feeling smooth you are possibly riding on the crown and don’t have good contact unless you Jeep is loaded down
 

Paluss

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I ran the stock 18’s on my Sahara 275/70R18’s at 32 and the ride was pretty smooth so 37# although feeling smooth you are possibly riding on the crown and don’t have good contact unless you Jeep is loaded down
checked the tire placard on the B pillar and it recommended 37 psi cold, just checked via tire gauge and all 4 are at 37, the 39 was via the tire monitor and connect app after vehicle was driven. Thanks for your help
 

BobK

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+1 for 37 psi on 37" BFG KO2's - love the feel of the ride!
 

gabeguy

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+1 for 37 psi on 37" BFG KO2's - love the feel of the ride!
I'm confused, I don't see any KO2's in 37" on Tire Rack, I've got the 315'S (which are 34.4") on my Rubi at 37PSI. Please confirm your post. Thx.
 

mazeppa

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35 psi front/rear WITH my tire pressure gauge for now. I need to chalk the tires soon to verify for proper on-road pressure dependent on MY vehicle.


Make sure you use the SAME pressure gauge each time you check/adjust tire pressure. Each individual consumer tire pressure gauge is calibrated differently, even with different gauges being from the same brand, type, and model. If you are reading 37 psi and I am reading 35 psi on our different gauges, my pressure could be actually higher than yours.
 

DeekT

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What do you all with rubicon K02s have the tire pressure set at? 36?
Almost everyone that chalk tested a Rubicon say 35 is perfect. I run about 33-34 cold. This gives me about 35 for around town and 36 for highway when they heat up. Ride is very good. At 6k miles I checked tire wear and it is even. BTW- my TPMS display is spot on with my Moroso tire gauge.
 

BobK

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I'm confused, I don't see any KO2's in 37" on Tire Rack, I've got the 315'S (which are 34.4") on my Rubi at 37PSI. Please confirm your post. Thx.
This is right from the BFG site along with the SKU.

Screen Shot 2018-08-28 at 10.53.13 AM.jpg
 

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At what pressure does the TPMS warning trigger?
 

RubyRed

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I put larger 285/75R17 Cooper ATP's on my JLUS (original tires were 245/75r17). They are E rated, and I read that anything below 45psi could be detrimental to the sidewall? Discount Tire filled them to about 43-45 when I picked it up. So I've been running 45 since.

Does anyone have any experience with this? Do you always follow the pressure stated in the doorsill regardless of tire size. In my case, the original Michelin 32" tires need 36psi... so would these new Cooper 33" tires also be okay with 36psi even though they're E rated? Maybe the chalk test is best method to insure your tires are inflated properly for the load.

I mainly drive on the highway, and noticed that it's drifting to the right more since I got these tires... just wondering if it's a tire pressure issue.
 

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