KO2 air pressure on highways

[garyji]

Larry, you may have a 29 threshold.

G.

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[Hoppy Toad]

What pressure do you run on the road? I've driven my stock 33" KO2s with 33#s cold, up to 40#s cold on the interstate, trying to find some sweet spot. I know the manufacturer recommends 37#s.

I've even had a long time Jeep guy tell me I should be running on almost the high limit of 50#s on the highway. I can't seem to hit the right pressure for my Rubicon 4xe that I feel comfortable boogying at 75-80 mph, and I have other Jeeps fly by me, even with aggressive all-terrain tires.

I run 30. Do a chalk test

 

[The Fixer]

I am amazed at the mileage some of you get out of a set of tires. You must do a lot of highway driving. The OEM Goodyears on my wife's JLU were down to the wear indicators by like 43K, even with 5 tire rotations, and I have about 34K on my BFGs. They're around 7/32nds with 5-tire rotations. Both of our Jeeps do mostly around town, heavy stop and go traffic driving.

 

[J.Ferreira]

What pressure do you run on the road? I've driven my stock 33" KO2s with 33#s cold, up to 40#s cold on the interstate, trying to find some sweet spot. I know the manufacturer recommends 37#s.

I've even had a long time Jeep guy tell me I should be running on almost the high limit of 50#s on the highway. I can't seem to hit the right pressure for my Rubicon 4xe that I feel comfortable boogying at 75-80 mph, and I have other Jeeps fly by me, even with aggressive all-terrain tires.

33 PSI cold. When I was running 37 PSI I could see that the wear was almost always just at the center of the tires.
Plus 33 PSI is just a bit easier on the suspension and the butt and back for everyday driving, IMO. and the tires wear evenly.
I have a Tazer Lite and adjusted the TPMS so that I don't get the pesky light.

 

[ArmyRN]

I try to keep my cold pressure at 32-33 so my running temps are around 37. I am on my second set of KO2s and I got 60k out of the first set. Sitting at 105k right now and still have plenty of tread left.

It is almost unbelievable just how much these tires change in tire pressure from cold to hot. Don't fret it too much and enjoy the drive.

Same here. 32 to 33 cold. 315.70.17 KO2.

This is the first vehicle I've owned that would give you a psi reading. I too am amazed how much these tires change pressure from cold to hot

 

[azwjowner]

Same here. 32 to 33 cold.

This is the first vehicle I've owned that would give you a psi reading. I too am amazed how much these tires change pressure from cold to hot

I have the KO2 in 255/75/17 on my 2 door, I run 32 psi cold, and they only get to 34 psi hot on the freeway for extended periods. Given that the larger tires require even less pressure, and people are running them at higher psi, interesting that they heat up more. Wouldn't have expected that, unless it's somehow a wide tire thing.

 

[BuffDad]

I have the OE Firestone Destination M/T 255/75R17. The placard states 37psi cold. And, my center tread is more worn that the outside. Should I drop the PSI to 35 psi?

 

[azwjowner]

I have the OE Firestone Destination M/T 255/75R17. The placard states 37psi cold. And, my center tread is more worn that the outside. Should I drop the PSI to 35 psi?

I have a 2 door but run my KO2s in your same size at 32 psi with excellent results. For a 4 door, I'd go 33. The placard says 37 because LT tires have no official ratings below 35 psi -- they really weren't intended for light Jeeps.

 

[JJ_WA]

I've made 2 trips from the PNW to Moab, both at end of summer. I set my cold PSI to 33. They warmed up to 37-38 on the road. This was comfortable for me. I wasn't the faster vehicle on the road, but easily kept up with traffic.

Interesting comments about the TPMS lights. With the cold snap a few weeks back 3 tires were at 31 and one was at 30, yet the warning lights never came on, in fact the only time I have ever had em alert is when I air down for trails

I live south of you. My tires hit 30 and the lights have been on, telling me to air up to 37 PSI. I finally got around to it today. I'll drive it until the lights go out then air back down to 32.

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