Start at zero and work your way up BE a Man..

For the roughest conditions I run my tires in vacuum.

Generally I’d say start at 15 psi. If that’s still too rough, or if you’re sinking on soft sand then go lower. Probably don’t go below 10 unless you have bead locks

I read a rule of thumb years ago. It said measure from your rim to the ground, subtract 25% from that number. Air down till you hit that number, and that is a good starting point. No idea how accurate it is, but its supposed to help you find max contact patch quickly.

Just don’t be that guy, 10 minutes into the trail ride, that announces on the radio you need to stop because you forgot to air down. 😂

what if u dont have any buddies :*(

Arrive at moab, immediately down to 10, air up a week later.

I find about 15 to be the sweet spot on my 37” Nitto ridge grapplers on a JLUR.

I got into a sticky situation with no way out other than back up a steep hill and ended up popping the tire off the bead when I went down to around 10 psi and maybe lower. I then repeated the procedure popping the bead on the spare as well. In addition to discovering the lower limit for air pressure, I also took a crash course in using a fire iron to put a completely flat tire onto the bead. The moment the thing went pop after trying for quite a while was super satisfying but little did I know that was only the beginning of an ordeal that was more than 24 hours being stuck. No cell service until the wheel was fixed only to make it up half way which is when we really got stuck as far as I remember it. I look back on the ordeal fondly as a character building triumph of the will of sorts but my gf thought we were going to die for real and has less than a positive characterization of the experience. In my defense, she was the one navigating which got us into the mess.

I’m an 18er with my stock 4 runner. I tend to run faster than most per my buddies. While 15-18 would crack and chunk out the Cooper Maxx’s I used to run, the Falken Wildpeaks hold up just fine. It’s a comfortable soft ride without losing too much clearance which I really need along with fresh shocks & bump stops in a stock vehicle. I was a hesitant to air down guy until I got beat up on the trail and took in some data points. Part art/science. 18 general purpose air down. Never lost a bead.

I used to tell my buddies to air down 'til it looked half flat. As the video says, every vehicle, driver, terrain,etc will cause the best pressure to vary a lot. I drove a 67 Jeep CJ5 with 33s on 10" wide wheels and i only ran 7-8 on the road and went as low as 2-3 offroad in the sand. My Jeep was light so this is what I needed. Heavier vehicles would need more. Over the course of 45+ years I never popped a tire off the bead.

Absolutely love your content, always informative especially for beginners and people new to Jeep life and off roading!

I like 20/15 on some fire roads or easy mild trails but for rock climbing trails I like 10psi especially if it’s a rocky road

If you ain't going below 20psi, are you even wheeling?

Thank you for the Information that you gif specaly for beginners ( sorry for my english its Not the best, i am german)

The chalk test you may think to be archaic but it is the most accurate way of finding the right pressure, for your tires, on your rig, with the weight you carry. There is no formula as accurate as the simple chalk test.. A formula can put you into the ballpark but the chalk test tells the true story.

Several books give very good advice on this subject. "The Four-Wheelers Bible" is a great one.

I prefer filling my tires with the very earth I traverse-nothing says 'desert-ready' like sandbag tires.

Crossed the Sahara on 6 PSI with tubes. Repaired 42 pinch flats.

Hey Brad. I was wondering if you could let me know or even make a video about what aftermarket seats you’ve used in your Jeeps? I’m considering replacing my OE seats in my JK. Looking at some Corbeaus or PRP.

Simple. As low as you can go without blowing a bead or side wall. There.

I have a 3500 diesel truck. And when I’m in snow and ice I’ll lower my tires to between 60 and 35 psi. When I go off road in mud and sand or soft rocks I’ll lower them from 80 psi to between 60 and 20 psi. And I also run on my truck the new Toyo open country R/T trail tires. And I absolutely like them. I think they are a grate tire for all driving conditions. I honestly think they’re better than all-terrain tires on traction and durability. But for those that, like a quiet tire, these tires are just slightly noisier than a all-terrain tire. But with these tires even in the rain I think they get better traction than all terrain tires at 80 psi. And I live in the north west so I get snow in the winter and these tires perform very well for a R/T tire.

Perhaps some of the latest vids that have popped up using a fairly scientific approach to airing down? (they did tests with tire prints on paper and measured actual surface area)

💯 Thank you

This are Milestar Patagonia M/T's. My favorite tire. I've had them on both my trucks for years.

I run 35s on my JKU at 37psi on the street and I run 10-15psi on the trail

Man, I love that red Jeep. I've got a silver JKU. I love it, of course. But, your Jeep just looks great.

I did 20psi and did pretty well last weekend

I'm a light off roader since my Jeep is my daily driver. I'd guess 20 psi would probably be a decent starting point, especially if one is relying on a buddy's air compressor or the nearest gas station to air up. Just a guess.

Yes, there is data out there. Look up "obstacle rolling resistance" using the quotes, for an old article showing how with low pressure, resistance goes up on flat ground but down when going over a raised obstacle. Also, VW was doing a lot of testing and data logging when they started Dakar, such that people complained it was an unfair advantage when they brought it to Baja. They were particularly using real-time temperature readouts, since building up too much heat would lead to punctures.

15psi maximum for most rock crawling. 12 or 15 psi for front and 9 psi for the rear in sand.

16-18 ❤

Years of wheeling across several Jeeps and SUVs (all without bead locks) had shown me that 10 psi is TOO LOW and 20 psi is TOO HIGH.

'22 diesel gladiator rubicon, stock wheels and Faulken ATs, I run them at 38-40 for daily, 20 seems to be a comfortable spot(for me) on mid grade trails

If you have a JK/JL with basic armor/bumpers, 12-15 is fine

PSI depends on too many things. I roll onto a plank of 2x4 and then deflate until it sags just below the top of the wood. 19psi for me.

Tbh with you, the only time you need really need to air down is driving on the beach or any sand area. Any dirt road or even rocky trail, you can still run full psi, just drive with more caution.

Jeep dude speaking jeep dude

On my XJ i think I ran 25 psi on roads with 33x12.5-15 rims that was almost "under sized for the tire width, off pavement that was probably 10-15 psi if that never really ever popped the bead. For example my 4wheeler I've ran 3 psi if any only popping the bead 1-2 times.

Depends on terrain I suppose

10psi in the 37x12.50-17 Pataguccis on my 80 series is right on the money for just about everything between Tijuana and Rapid City. Super plush, plenty of grip, and can still deal with 20-30mi of highway to/from camp, between trails, or getting down to a reasonable elevation to not torture my compressor while airing back up. Running basic moto metal 17x8 wheels that were on it when I bought it, have yet to pop a bead. No beadlocks - just paying good attention to my lines / tire placement, and steering timing + force... And a good bit of "pleasepleaseplease" when I do lose a line in the wet and start sliding sideways down a slab 😆

Where are your tires manufactured?

KZfaq give me more trailrecon

I've aleays heard keep dropping a psi every trip until you pop a bead. Go with one more than more than that.

1997 TJ, stock wheels and 35x12.5r15 MTR's. I air down to 10psi. I think I lost a bead at 2psi. I'll experiment with lower pressure in the future.

Many years ago I lowered down to 5 psi on on a 1980 Toyota short bed pickup with 31s on on 8 rims and popped a front bead on a rock. After that I lowered down to 8 psi. Then I ran 33" mud terrain radials on the same 8" rims which performed extremely well on rocky stream beds, mud, snow, and sand. Like Brad said, it's trial and error. A caveat is that if you pop a bead it tests/enhances/builds your offroad recovery/repair/survival skills. Always, always, always EXPECT something to go wrong with your rig or someone else's rig, and use the experience to gain skill and knowledge. When stuff goes wrong be glad you have an opportunity to improve the above mentioned skills.

12-14 treats me well, 0-4 in snow

Seat of the pants always finds the sweet spot.

It's just a matter of trial and air... 😋

One time I had 2.5 psi on 35s with my old yj, from looking at it you’d guess they where at 10psi those coopers where wayyyy too stiff😂

I don't air down unless necessary. Its only a minute benefit. The type of tire and tire size makes a bigger difference.

I drop down to 9psi on my Baja Bosses on TJ Canyon rims.

12 psi 24/7 on my TJ. FS roads only. Tires are disposable. Replace annually. Works for me. Your results may vary....

My rule? Air down only when necessary! That being said? I only take my Jeep wrangler places I need too or want get too👊

Anyone that has ridden a dirt bike, motorcycle, or mountain bike at low tire pressure knows that at the extremes you end up with too much traction on harder surfaces and that leads to poor handling, poor cornering, poor braking and generally poor driving characteristics (aka steering lag). Tire manufacturers will almost never tell you to air down your tires because 99% of the time it is unnecessary even in low traction conditions. I've driven hundreds of thousands of miles in deep snow etc. and nearly every circumstance where airing down might potentially help had additional circumstances like a RWD/FWD car, steep slope, high center, etc. If your suspension is tuned properly already low tire pressure in general will cause handling and performance problems. So even if you're driving dunes you will be a lot better off with sand tires or larger volume tires (i.e. a 50 vs a 40 or a 40 vs a 34 etc.) than trying to do it with low tire pressure + high speed. That doesn't add up to better performance.

12 is always good.

I run 15-18

I run 6 up front and 4 in the back

7-tons air down to 7psi in mud and sand settings. Mrap was around 15 psi Mat-v is around 10. Military trucks are usually ran now with a ctis system. Thats what I would use if it's applicable on a jeep let's say.

Simple, the lower the better. Going below 9 means you'll need bead locks

Yep

Hi Brad, I run 275 65 R18 Ko2’s on a 2.5 inch lift on my 5000 plus lbs LR4 with 50 psi and it beat me to death, I lower them to 30 psi on forest roads with combined wash board and some rock, what an improvement! Softer ride, minimal height lose and improved traction is noticeable. I decided to run 48 psi on pavement and though my fuel mileage decreased a little from the 50 psi, my wife really appreciates the softer ride there too. I’m not inclined to rock crawl, so I haven’t aired down below 30 psi but I’m going to try airing down to at least 20 or 25 one of these days and run some rocky roads here in New Mexico. Thanks for covering a subject most KZfaqrs haven’t yet, it is so fundamental to our off-roading experience that it was about time someone in the know shared their personal expertise and experience!

I run 12 or 8

I run 15 psi on 35s no beard locks

410 fly tires, it's around 20 no load on 15 on rocks.

Dry sand 10 works great

15 psi it’s good enough for starters

What valves are you running ?

But 14 is the right answer

I find airing up to 45 works best. Try it.

This has nothing to do with tire pressure but do you or anyone out there know how to fix the speed sensor issue that JK’s are so prone to?

Everybody is their tie down to suit the terrain where and when possible and this is a excellent idea but unfortunately it's not all the truth for the correct airing down. You let your toys down so you can get more traction and better footprint but unfortunately your tires are not all the same with the weight of your vehicle or in the back of the vehicle including any trailers you might drag behind you. Here is the correct way of letting tires down for the same footprint. Let your front door down to whatever air pressure you want. Now measure the length of that footprint from the front and rear of that tyre it might read 30 cm long don't worry about the PSI that could be 25 who knows. Now you let the rest of your ties down to the same footprint. All four tires on your vehicle are now 30 cm long now your vehicle is balanced. You do the same thing with your caravan or trailer whether it's single axle or tandem you run your trial as the same length of tread on the ground as your vehicle. So you should have four six or eight wheels with the same footprint but yes they will also be different air pressure's that is not what you worry about it is the overall footprint. Now your vehicle and it's running gear will love you for this so will your engine and fuel tank and most of all your wallet will thank you to. Because everything is balanced and running smooth. Thank you

It's kinda hard to take tire advice from a guy running those awful Patagonias.

5 psi

Why did you do this video 😂

Love the videos🤘🤠🤘 would love to chat with you about the video setup you use...great shots will send a subscribe from my other channel

Rule of thumb to start out is your rim size

Uhh no its not working how it should be working if you cant hit 15 mpg. I have 3 4x4 xjs and about 17 is the worst ive ever got. 20-21 highway.

Bla bla bla yada yada ya. Geez😢

I worked for the Forest Service for 10 years of drove every type of road imaginable, and never once aired down my vehicle now as a civilian wheeling around Northern California I still have not once aired down my jeep wrangler or my Gladiator

Manufacturers of tires do not advise any rational tire owner to deflate any tire bellow the exact recommended tire pressure which is derived precisely in order to create the structural integrity required to hold up 1/4 the vehicles weight - now send that vehicle into extreme terrain and this should only result in adhering to these recommendations if you are equipped with a rational brain - lowering tire pressure on a 4x4 is merely exaggerated fluff from offroaders combined with booze and folklore thinking - zero advantage and typically causes issues including tire release - grow a brain and bring spares lmao 🤷‍♂️🤪👍

I’ve aired down my 17 inch lo profile falken all seasons just to have enough grip to take off from a stop here when it’s snowy and icy