275 70R18 Tire Question

IdaD wrote:
60 all around once the camper is parked for the year. Then I bump the rears back up to 80ish when it's time to get it out again in the spring. 80 is too high unloaded but I don't enjoy deflating and reinflating my tires over and over.

I have a clip on air chuck. Without it on an air hose it makes a great way to deflate tires. I can tell by the sound of the air escaping when it is getting to around 44 pounds(Rears empty). Chris

60 all around once the camper is parked for the year. Then I bump the rears back up to 80ish when it's time to get it out again in the spring. 80 is too high unloaded but I don't enjoy deflating and reinflating my tires over and over.

There's an easy way to sort this ought: Do the Math.

Calculate what pressure is required to carry the GAWR for the size listed on your truck.

If you do that, then you will find that vehicle tire placard will have enough load carrying capacity for the rated GAWR - even if the max pressure of the tire is more.

Unloaded/daily driving I run 65-70 psi/cold all around. Loaded/ready for a camping trip I run 76-78.

Well, first time this has come up......
There are those that believe putting in the right amount of air for the given load and those that believe the max pressure is the ons size fits all option.

The answer to the OPs question is you "can" run max sidewall psi in all 4 tires empty or loaded and no harm will come of it, save for a rougher than necessary ride and an easier loss of traction in conditions that approach the edge of traction.

I prefer to adjust air for the load and with OE size tires on a HD diesel pickup, that's about 60psi front /40 rear giver take for an empty truck.

donn0128 wrote:

Me Again wrote:

donn0128 wrote:
Unloaded run the pressure listed in the door post. Loaded I always run max as listed on the tire sidewall.

That is flat wrong! The SRW RAM do not require 80 in the front at any time. 60-65 works fine except maybe with a truck camper. But hey, who hauls a TC with a SRW.

Empty 60/40 loaded 65/80(11700 CWR on to truck, combined 24,500).

Chris

Chris, you can do what you want. I will continie to do what I have done for the last 27 years. BTW, my last set of tires were worn even across the tread on all 6 tires.

With current model RAM dually, yes 80 lbs in the front all the time. SRW no way!!! BAD info no one should follow! Duallies only need 65 lbs inflation in the rears for full GAWR.

I use to respect your posts!

Chris

Me Again wrote:

donn0128 wrote:
Unloaded run the pressure listed in the door post. Loaded I always run max as listed on the tire sidewall.

That is flat wrong! The SRW RAM do not require 80 in the front at any time. 60-65 works fine except maybe with a truck camper. But hey, who hauls a TC with a SRW.

Empty 60/40 loaded 65/80(11700 CWR on to truck, combined 24,500).

Chris

Chris, you can do what you want. I will continie to do what I have done for the last 27 years. BTW, my last set of tires were worn even across the tread on all 6 tires.

donn0128 wrote:
Unloaded run the pressure listed in the door post. Loaded I always run max as listed on the tire sidewall.

That is flat wrong! The SRW RAM do not require 80 in the front at any time. 60-65 works fine except maybe with a truck camper. But hey, who hauls a TC with a SRW.

Empty 60/40 loaded 65/80(11700 CWR on to truck, combined 24,500).

Chris

I usually run 70/40.

Door post says 60 front and 80 rear. 80 rear seems high when unloaded.