bhshakari

I have Yokohama Geolander G003 M/T 265/70 R17 on my stock allow wheels. It's a 10 ply tire, load rating E, the recommended tire pressure (on road) for my 2016 F150 super cab is 35 psi. I am wondering how low I can air down without blowing my beed. I called yokohama and they simply said to use the recommended 35 psi. I'm going to assume they said that to just cover their but for liability and warranty purposes.

Any suggestions?

Smartzombie

I go down to 20 psi on my bfg all terrains. Never have had a problem

dlbb

half of standard air is common starting. ie my warm tires are at 42. i drop to about 20-25. on lazy/not to bad trails i only drop to 25-30. but for the rough stuff i drop all the way down to 20. i never go below 20psi. sand and silt was fine last night at 30psi. deep sand may need to drop to 15psi if you are digging in from heavy throttle. at 10-15psi the bead can come off.

STingray1300

Reading the door sticker for tire pressure recommendations: bad idea. ALWAYS.

The OEM tire for your truck was a 4 ply rated tire. That 4 ply tire was carrying a 5,000+ lbs truck. The door sticker, from the manufacturer... of the TRUCK, tells you what [Ford] wants you to run in your tires so that you get a nice smooth ride -when the truck was brand new, with new, stiff suspension bushings /et al. They didn't, and still don't care what kind of mpgs you get, or what kind of mileage you get out of your tires.

Do yourself a favor, you should be running 40-45psi in those 10-ply tires. More if you load the truck. Then, after a couple of thousand miles, do the "chalk test". Take a piece of chalk and mark across your tread. Drive straight ahead for a block or so (no turning!). Stop and check the chalk line. Any chalk left on your tire? No? PERFECT! If there's chalk on the edges, you need less psi (start with letting out 5psi). If there is chalk in the center of the tire, you need more air. (up it 5psi), When you get no chalk line left after the test, that is the correct psi for YOUR truck.

I started working in tires (Goodyear) in 1976, and I have never (ever) seen a car/ truck/whatever, run the "recommended psi" as stated on a door sticker. Not and didn't have either poor handling or poor tire life.

I run 50psi in my 10-ply 305/70 Toyos. 10k on them now, and they are wearing perfectly. That's the correct psi for MY truck. (I've gotten over 85,000 miles out of -2- sets of all terrain tires on -2- different trucks by using my head in the matter of tires. I hope you can benefit from using yours.

bhshakari

Excellent, thanks for the good beta guys!!

bhshakari

(I've gotten over 85,000 miles out of -2- sets of all terrain tires on -2- different trucks by using my head in the matter of tires. I hope you can benefit from using yours. [/QUOTE]

Holy smokes! Is that 85,000 miles combined or for each set?

STingray1300

No. That's 85,000 miles on one set of tires on one truck, and 85,000 miles on another set of tires on a different truck. Both sets of tires were Uniroyal Laredo A/Ts (sold through Big-O back in the day). They don't make them anymore. DAMHIK! And I lost the last set due to DOT regs. After 10 years from date of manufacture, they are outdated and unserviceable (legally). One tire (1) had a slight separation in it. The other 3 were fine (10k left in them). But they were outdated. So I had to buy new tires.

Havyek

As for pressure for offroad use, I run between 6-8 on my TJ on Mickey Thompson MTZs rock crawling. Have never blown a bead.

Recommended pressure? Air down until they look bulging but not flat.
If you're running over sand dunes, it'll be a totally different pressure than up a rock face.

Bring ratchet straps and a compressor for if you do blow a bead, but if you stay in the 15-20 range you'll more than likely be fine.

M0RRIS

I agree with the comment about 20-25psi. With the 10ply it won't look like you've aired down but it'll be fine.

My previous ranger had E-load 265/75r16 duras. I don't know why discount put e-load on a small truck unless it's all they had. I would air down at silver lake sand dunes and never had a problem when I did.

Also when discount mounted/balanced them they put 50-60psi in them. That truck was all over the road on the way home. I lowered it to 35-37psi and on the street I didn't have any issues either. I got even tread wear and they showed signs of cracking over the 5-6 years I had them. I traded the truck in and don't know what happened to them.

M0RRIS

The two pics in the sand are not the best but I am aired down. The parking lot one is street height and psi.