Dually tire pressure?

Just for the referral how the weight can be different, my F350 dually shows 4800lb on front axle with long camper and 140 lb generator of front hitch.
Than my front tires did show 65 psi in hot Las Vegas and a week later they show 60 psi in Washington state. Did not air them for 2 years, so now it is good time.

TxGearhead wrote:
LT 235/80 R17 LR E 10 ply rating. 3085# Single at 80psi.
Front GAWR 6,000
CAT Scale empty: front: 5260. Rear: 3540
Cat scale with Bigfoot ready to camp: front: 5460. Rear: 7520.

Thank you , this is what I suspected . Probably those who said 65 psi and 55 psi are correct also. Front tire inflation is vehicle specific for the FAWR and the tire weight rating . Without the details it's all meaningless .

Grit dog wrote:
This thread needs to die...

Yep, I've heard enough myself.

jimh425 wrote:

TxGearhead wrote:
DRW traction...why wouldn't a DRW have good traction?

I’m sure you probably noticed how a pickup is light on the rear and spins pretty easily compared to a car for anything but dry pavement is very noticeable. A DRW is worse than a SRW because it has double the tires and tends to float compared to even a SRW.

Of course, once you put 2 tons in the bed, that all changes, but it seems like this discussion is about empty. Which means more air, more tire on the ground and more floating.

That doesn’t even count that the DRW tires don’t line up with the fronts so they always make at least part of their own track. In any case, I don’t think any of us buy DRWs for traction, but hey, maybe someone did.

Off road, yeah maybe. Pavement? I don t think so.

This thread needs to die...

Kayteg1 wrote:
Laws of physics say other wise.

Your picture doesn’t represent any laws of physics.

jimh425 wrote:
Which means more air, more tire on the ground and more floating.

Laws of physics say other wise.

TxGearhead wrote:
DRW traction...why wouldn't a DRW have good traction?

I’m sure you probably noticed how a pickup is light on the rear and spins pretty easily compared to a car for anything but dry pavement is very noticeable. A DRW is worse than a SRW because it has double the tires and tends to float compared to even a SRW.

Of course, once you put 2 tons in the bed, that all changes, but it seems like this discussion is about empty. Which means more air, more tire on the ground and more floating.

That doesn’t even count that the DRW tires don’t line up with the fronts so they always make at least part of their own track. In any case, I don’t think any of us buy DRWs for traction, but hey, maybe someone did.

jimh425 wrote:
Funny that this thread is comparing DRWs to drag cars now. :)

Any way, the effect of air pressure on traction depends on a lot of factors. More contact patch can lead to more float and less traction or more traction depending on if the road is dry or not and the material surface, and of course, tread compound. In any case, I don’t think anyone probably thinks DRWs have good traction in rear either way.

Also, if the harder front tire has less sidewall flex, the harder rear tire (with more air) will as well.

As noted, I have 19.5s, so I’m not going to be airing down much past 70 in any case. I’d prefer my beads to stay in place. ;)

DRW traction...why wouldn't a DRW have good traction?

LT 235/80 R17 LR E 10 ply rating. 3085# Single at 80psi.
Front GAWR 6,000
CAT Scale empty: front: 5260. Rear: 3540
Cat scale with Bigfoot ready to camp: front: 5460. Rear: 7520.