G614 RST Tires PSI

[lestx]

Side walls read 3750@110 PSI Cold. OUR 09 3400RL has a axle wt of 10360 LBS,2590 per wheel, This is without a 1/4 tank of water,Clothes and food. Is it ok to run at 110 PSI cold ( lower heat factor) or at a lower pressure maybe 105 ? Using a TPMS what would a safe under and over PSI alarm? Goodyear had little support other than 85 PSI on the low side.
Thanks,
Lestx

[bncinwv]

Go to Goodyear's web site and refer to the load inflation table that is available. On our 3750, I usually run cold pressure of 95-100 psi. Over pressure alarm is set for 120 and under is set for 80 psi. With your weights, 110 psi is overkill! After you do your homework, you wil know the comfortable range for your application.
Bingo

[lestx]

Thanks Bingo,
I look over the load inflation tables and had a few questions. Will print off and study. Running 110 PSI sounded very high for my wheel weight.
Thanks for your thoughts.
Lestx

[8.1al]

Before you decide on a lower pressure you really need to know how much weight is on your tires loaded for a trip.

[hunts800]

What would be the downside to running 110 psi cold even if you don't know the specific weights on each wheel. Seems like the "default" mode ought to be 110 psi, or am I missing something?

[DQDick]

This is another reason to get your trailer weight on each of the wheels. Those of us who have a side kitchen with all the canned goods and appliance weight on one side may have a lot more weight on those tires than the tires on the other side. Add to that the wind load in Kansas and under the right conditions the weight on one side could be very different that on the other.

[Art-n-Marge]

The only problem with running at 110 psi and you don't need it is that the tires might be overinflated for your load. Check your tires often and ensure they are not wearing on the center too fast compared to the edges. This is the indicator that there is too much air. Being overinflated means you trailer might be bouncing too much which is not good for handling and other parts of the trailer. The worse part of this if you might not feel it since you are in the tow vehicle. But then you'll wonder why the contents in the trailer are now on the floor because of too much bouncing.

If you weigh your rig and put in just enough psi to match what the trailer weighs, then check your tires often that the edges are wearing not out faster than the center. This means they are underinflated and this is a worse problem that over inflated.

I also just use 80 psi for when I have full tanks, too much food or whatever other variances that can change the weight. If I stay at the max and keep the trailer under its GTWR then I'm confident it's the best it can be.

My weight at my rig's wheels are about 2700 lbs all around. The ST tires I have recommend 80 psi to support up to 3,460 lbs each. At first glance it would seem I'm overinflated, but I've had these tires on the rig for about three years and they are wearing like they are just right, so I just leave them at around 80 psi since that's easier to remember and it doesn't seem to be overinflated.

Every rig combination seems to be different and that's why it's important to learn what works for you, than depend on others which may then not work for you. At least these posts bring up a psi to start.

Good job on the TPMS.

[Phil P]

Hi

We are using the Goodyear G614. Using Goodyear’s weight to pressure chart we determined the tire should be operated at 95 Lbs. cold.

Tredit installed these tires for us over 2 years ago(we supplied the tires). I haven’t had to add air to the tires yet. The weather just turned cool here in Florida when I get to the trailer this afternoon I will check the pressure and see what it is at this temp.

Phil P

[CamillaMichael]

quote:Originally posted by Phil P

Hi

We are using the Goodyear G614. Using Goodyear’s weight to pressure chart we determined the tire should be operated at 95 Lbs. cold.

Tredit installed these tires for us over 2 years ago(we supplied the tires). I haven’t had to add air to the tires yet. The weather just turned cool here in Florida when I get to the trailer this afternoon I will check the pressure and see what it is at this temp.

Phil P

At this time of year, I am always amazed at how much the tire pressure varies from am to pm...as the temps are close to freezing in the am and close to 70 in the afternoon, the tire pressure can easily vary 5 or 6 psi. I like to take readings during both am and pm over a couple of days to make sure I am seeing a difference due to temperature, not loss of air from the tires.

[DarMar]

We run at 95 PSI as well!!!

[stiles watson]

I have been running between 100-105 for 4-1/5 years. Wear looks even.

[mhs4771]

This is a topic that will get answers from one extreme to the other. I've read in numerous places where they reccommend inflating to the max as listed on the side wall. I'm running 100 psi, don't think I would want to go much less because of the twisting/torqueing of the tires in sharp turns. You still have to have enough pressure to keep the tires on the rims. Back when Radial tires first came out, auto mfrs were running the pressure in the mid 20s to give that soft ride, but during hard cornering the tread would stick to the road and roll the bead right off the rim. I know the P rated car tires are of different construction, but you still have to maintain enough pressure to keep those trailer tires on the rims during those 90 degree turns backing into a tight spot. Just my nickel's worth