Influencer II
Just curious to what everyone airs down to with NON beadlock wheels. I'v got BFG 285 /75 /17 KO2'S .
Airing down.
- Thread starter WrightRunner
- Start date
Influencer II
Influencer II
37x13.50 17 I air down as low as 18psi depending on trail conditions. If heavily loaded I run 20-25psi
I tell people my rule of of thumb is that the safe minimum pressure number is the same as the rim size. A tire that said xxx/xxR17 would be 17 psi, a 35x12.50-15 would be 15 psi, etc. This makes it so the tire will always tell you what pressure, no matter the vehicle. Yes, many people air down beyond that number without issue, but the people that know that already don't ask me what they should air down to. 
285/75/16 Duratracs. 25 psi for general no thrills off road and 20 for anything more involved.
I've had no problems airing my 285 KO2’s down to 20psi
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Member II
Without bead locks, I've ran as low as 10 psi. Normally I run 12-15 psi.
Influencer I
Run mine usually Dow to 30 psi but will be trying them at 25psi on the next trip. 50/80 is the OE recommend psi.
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Vehicle (weight) would be a factor too. Xpsi on a 2 door jeep is different than on a 4runner which is different than a full size.
Probably more beneficial if people post their aired down pressure compared to manufacturers recommended pressure, or at least what vehicle it is.
Probably more beneficial if people post their aired down pressure compared to manufacturers recommended pressure, or at least what vehicle it is.
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Off-Road Ranger I
I've gone as low as 5 pounts on my KM2 35 inch tires in the snow to get enough flotation, and run as low as 12 in Moab. Normally, I run 16 rock crawling.
Benefactor
There are so many variables when airing down. The bast practice, taught at most off road driving schools, is a visual indicator. Air down, until you see the bulge starting. This will happen at different pressures depending on sidewall attributes, weight of vehicle, etc... let your eyes be the judge. The preasure will very between front and rear tires, do to vehicle weight distribution.
MojaveOverland
Rank IV
Enthusiast II
2011 JKU w/Nitto Mud Grapplers 35x12.5x20 and I normally run around 10 psi. Will run 8-9 psi if I know there will be rock crawling involved. (no beadlocks FYI)
I'm in a 2016 JKU, I was running 35x12.5x20 and aired down to 12psi with no issues. This was on non beadlocks. I'm now running 37x12.5x17 and air down to 10 psi with no issues. I have beadlocks now but haven't done any serious rock crawling yet so I've only been down to 10.
Influencer I
Influencer I
Airing down depends on the vehicle weight, tire/wheel size and trail conditions. I can not stress how important airing down is. 1) the comfort inside is so much better because you don't feel every little rock. 2) the off road abilities of your vehicle goes up tremendously. Also consider the speed you are traveling. If you are spending the day below 15mph sidewall heat is not an issue. Don't drive at 20-30mph for extended times with tires that have been aired down.
I have a one ton Chevy dually that I pull a toy box trailer in pure sand. For that I run 20psi front, 15psi rear (20,000 lbs total gross weight) and I air the trailer down to 20psi.
In my old CJ5 days, light vehicle, I would run 9-10psi.
With my current Land Rover with 18" wheels I run 20psi in rocky conditions, 18psi in sandy conditions and 15psi in pure sand.
Don't forget to air down when traveling in snow also!
I have a one ton Chevy dually that I pull a toy box trailer in pure sand. For that I run 20psi front, 15psi rear (20,000 lbs total gross weight) and I air the trailer down to 20psi.
In my old CJ5 days, light vehicle, I would run 9-10psi.
With my current Land Rover with 18" wheels I run 20psi in rocky conditions, 18psi in sandy conditions and 15psi in pure sand.
Don't forget to air down when traveling in snow also!
I have Nitto 35x12.50R17 on my FJ. I usually run 32 on hard ball. Mild trails I go down to 20. Rock crawling down to 16. I've gone as low as 12 on the dunes....rides like a Cadillac.
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