New Sailuns.

[Flashman]

I just mounted new Sailun 235/85/16s. Should I run 110 PSI or 95 PSI. I got both opinions at the tire store. I'm in Tucson and we get hot - does that make a difference?

[Flashman]

Frail Huh???

[GIB2]

Flashman: I totally agree with Cummins 12v98 on my truck even if it is a 2020 GMC. As far as your question I would put 100 psi and I would purchase a $6.00 tire depth gauge and monitor the wear pattern over next few thousand miles to determine exactly what you need. The tires won't know the difference anymore than your tire personal did and if they are that frail you purchased the wrong tires.

[joebedford]

2600x6 + 3060 = 18800

Yes, I weighed it.

BTW, I leave my TV tires at 80 because I only ever drive the truck (any distance) with the 5er hooked up. For the few km I put on without the 5er, it's not worth dropping the pressure.

The 5er tires may have been over their capacity but they certainly weren't over their rating. Anyway, I got S637s which are G or H rated (don't remember)

[Cummins12V98]

joebedford wrote:

Cummins12V98 wrote:

joebedford wrote:
I have Sailun S637s. I run 110psi despite the fact that I have "only" 2600lbs on each of 6 tires.

Your tires, your money but that's one HE!! of a rough ride! Center tire wear and less stopping ability.

FWIW, the last set of tires wore out at the edge of the tread, not the middle. They were E rated tires inflated to 80psi

What that tells me is you were over the tires capacity. Did you ever weigh it?

[Cummins12V98]

joebedford wrote:

Cummins12V98 wrote:
Not many can say this towing a 5er with 6k pin weight 1/2 of the trucks miles.

But heck maybe I should run MAX of 80psi on all six tires?????

I run 80 psi on my truck all the time but then I don't have a trailer with 6K pin weight (mine's only 3060)

You should read what your door says about inflation. Mine says 6k front axle rating needs 80psi and rear needs 65psi at 9,750#.

[joebedford]

Cummins12V98 wrote:
Not many can say this towing a 5er with 6k pin weight 1/2 of the trucks miles.

But heck maybe I should run MAX of 80psi on all six tires?????

I run 80 psi on my truck all the time but then I don't have a trailer with 6K pin weight (mine's only 3060)

[joebedford]

Cummins12V98 wrote:

joebedford wrote:
I have Sailun S637s. I run 110psi despite the fact that I have "only" 2600lbs on each of 6 tires.

Your tires, your money but that's one HE!! of a rough ride! Center tire wear and less stopping ability.

FWIW, the last set of tires wore out at the edge of the tread, not the middle. They were E rated tires inflated to 80psi

[Cummins12V98]

JIMNLIN wrote:

bucky wrote:

Cummins12V98 wrote:
Weigh your tires separately if possible. Use the weight/inflation chart for your tire size and load range. Add 5psi to what your chart says. This is per GY Tech support. You will get some nay sayers on here but I have towed many thousands of miles using inflation charts on vehicles and RV with great results. Better stopping, ride and tread life.

This is exactly right. Heed the advice.

Advise from Goodyear officially comes from their websites "weighing RVs" which follows advice from tire experts like Tireman9 and a host of other website blogs on proper tire pressures for tire in a trailer position.... ;

Goodyear Tire and Rubber .... weighing RVs
Special Considerations

** Unless trying to resolve poor ride quality problems with an RV trailer, it is recommended that trailer tires be inflated to the pressure indicated on the sidewall of the tire. Trailer tires experience significant lateral (side-to-side) loads due to vehicle sway from uneven roads or passing vehicles. Using the inflation pressure engraved on the sidewall will provide optimum load carrying capacity and minimize heat build-up**.

Of course Goodyears and tire experts thinking is the trailers tire selections were per the FMVSS regs...not a rv rookie severally over tiring the trailer to the point of having to derate the tires sidewall pressures/best sidewall stiffness.

You see it does not natter what a GY Tech told me or my long time experience using weight/inflation charts with excellent results. What does matter I guess is what's cut and pasted .
"Unless trying to resolve poor ride quality problems with an RV trailer" this is what a person is trying to do running a heavier load range tire because an 80psi "E" tire running within it's capacity is fine but changing to a "G" tire at 110psi is going to give you "POOR RIDE".

[Cummins12V98]

bucky wrote:

Cummins12V98 wrote:
Weigh your tires separately if possible. Use the weight/inflation chart for your tire size and load range. Add 5psi to what your chart says. This is per GY Tech support. You will get some nay sayers on here but I have towed many thousands of miles using inflation charts on vehicles and RV with great results. Better stopping, ride and tread life.

This is exactly right. Heed the advice.

YES but common sense does NOT apply sometimes. I have done so for many thousands of miles with perfect tread wear and long tire life.

Example I run 30-35psi on my DRW's rears unloaded. I run 65-67 at full rear axle rating of 9,750#. I run 80psi fronts all the time. I will easily get 60k out of my Michelin's. Not many can say this towing a 5er with 6k pin weight 1/2 of the trucks miles.

But heck maybe I should run MAX of 80psi on all six tires?????

[Cummins12V98]

BarneyS wrote:
I am not towing now but for about 36 years I always inflated my trailer tires to the max indicated on the sidewall. I never once in all those years had a blowout or any other type of tire problem other than a couple of punctures.

Unlike car or truck tires, a RV is usually pretty close to the tire weight limit all the time. Add in all the twisting and dragging when turning and you have a very bad situation for the tire. Hence, my recommendation is to follow the guidelines of most of the manufacturers and fill to the max as indicated on the sidewall.
Barney

But did you go from let's say an "E" tire that the load was just right to a "G" and run full inflation?

[Cummins12V98]

joebedford wrote:
I have Sailun S637s. I run 110psi despite the fact that I have "only" 2600lbs on each of 6 tires.

Your tires, your money but that's one HE!! of a rough ride! Center tire wear and less stopping ability.

[BarneyS]

I am not towing now but for about 36 years I always inflated my trailer tires to the max indicated on the sidewall. I never once in all those years had a blowout or any other type of tire problem other than a couple of punctures.

Unlike car or truck tires, a RV is usually pretty close to the tire weight limit all the time. Add in all the twisting and dragging when turning and you have a very bad situation for the tire. Hence, my recommendation is to follow the guidelines of most of the manufacturers and fill to the max as indicated on the sidewall.
Barney

[Lwiddis]

MLF writes about “coolest running.” That’s my view too so I inflate to the pressure indicated on the sidewall.

[fj12ryder]

Splashers3 wrote:
Where were your new Sailuns made? China or Vietnam

I think all the S637 Sailun are made in Vietnam now.