Saliun S637 Tire Pressure

avvidclif1 wrote:


Be very careful with your recommendations. Goodyear publishes a chart for THEIR TIRES. Ask them if it applies to other brands? I can guess the answer. If the mfg of the brand of tires you are using publishes a tire pressure vs weight chart use it. Otherwise I wouldn't be "borrowing" somebody else's. If nothing else contact the mfg of your brand of tires and ask about inflation pressures. They made them and should know.

The other problem is you have to weigh each tire to properly inflate it. Just dividing the trailer weight on the axles by 4 doesn't take into consideration the different loadings on the individual tires.

All tires except ST tires follow industry standard inflation tables. So the inflation table for a GY LT235/85R16G is the same as the one for Sailun's LT235/85R16G.

Cummins12V98 wrote:

taken wrote:
110 PSI will not cause any of the issues noted by meagain and will give you more stability at highway speed due to more sidewall rigidity. Set it and forget it.

Maybe you should call GY Tech Support and they will tell you a completely different story.

I did call them and read what they said in their RV tire brochure. They said you should ALWAYS run the max pressure an RV tire was capable of taking unless you are trying to remedy a rough riding situation. This, according to them, would give you the best towing experience with no side effects. Glad you brought it up.

As per Goodyear's RV tire guide:

"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."

As another forum poster aptly posted:

Using a minimum pressure from a tire chart isn't the best idea for a tire on a trailer for several reasons.
The biggest reason industry experts and tire manufacturers recommend max sidewall pressures is internal ply shear forces.
Tires on a multi close spaced trailer axle system in the center of a heavy box actually slide sideways at the trailer is pulled around the corner (side scrubbing).
Max pressures help hold the tires shape and helps reduce shear forces at work.
Cooler operating and a host of other reasons.

avvidclif1 brings up a good point. Before everyone get carried away trying to dial in their precise pressure for the exact weight of the trailer have you considered each tire has a different weight?
While we may not know the weight of each tire. I think we do know each tire does not carry the same load/weight. With that in mind is it beneficial to air them to the same specific pressure if they are not carrying the same corresponding weight.
At the end of the day max. PSI is as an effective method to air the tires as any. It is also a lot simpler. Keep an eye on the tires to ensure they are wearing evenly and adjust accordingly. It's really not that complicated....No charts required.
I purchased my Sailun's because I wanted extra capacity not exact capacity.

Too much theory. Not enough camping.

Cummins12V98 wrote:

Me Again wrote:

pjberny5 wrote:
Dumping the Tow Max tires this week and replacing all 5 with the Saliun S637s 235/85R16 (G). My question is do you run them at the Max PSI of 110.

I have a Big Horn 3260EL when loaded weights 12,600 verifed by putting her on the scale.

Would appreciate the advice of anyone else that is using this tire.

Thanks in advance

If you want to beat you trailer up, have less braking, and a bigger chance on impact damage to the new tires then go ahead and run them at 110 inflation.

You are not clear on if the 12,600 is the weight on the axles or the total weight of the trailer(GVWR is listed as 14,000). Know the weight on the axles, preferably by each wheel position, and set the air to 5 lbs more than the inflation chart says based on the heaviest wheel.

70=2765, 75=2905, 80=3042, 85=3170, 90=3300, 95=3415, 100=3550, 105=3675, 110=3750

http://www.goodyearrvtires.com/pdfs/tire-care-guide.pdf

At 110 the four tires can carry 15,000 pounds. You do not need that!

Chris

Geez you sound just like me!

I totally agree! The load charts are there for a reason. I went from E's to G's and ran 85 for several thousand miles and the tires had perfectly even tread wear.

Be very careful with your recommendations. Goodyear publishes a chart for THEIR TIRES. Ask them if it applies to other brands? I can guess the answer. If the mfg of the brand of tires you are using publishes a tire pressure vs weight chart use it. Otherwise I wouldn't be "borrowing" somebody else's. If nothing else contact the mfg of your brand of tires and ask about inflation pressures. They made them and should know.

The other problem is you have to weigh each tire to properly inflate it. Just dividing the trailer weight on the axles by 4 doesn't take into consideration the different loadings on the individual tires.

taken wrote:
110 PSI will not cause any of the issues noted by meagain and will give you more stability at highway speed due to more sidewall rigidity. Set it and forget it.

Maybe you should call GY Tech Support and they will tell you a completely different story.

At 85PSI you will have a load carrying capacity of 11,540#.

Me Again wrote:

pjberny5 wrote:
Dumping the Tow Max tires this week and replacing all 5 with the Saliun S637s 235/85R16 (G). My question is do you run them at the Max PSI of 110.

I have a Big Horn 3260EL when loaded weights 12,600 verifed by putting her on the scale.

Would appreciate the advice of anyone else that is using this tire.

Thanks in advance

If you want to beat you trailer up, have less braking, and a bigger chance on impact damage to the new tires then go ahead and run them at 110 inflation.

You are not clear on if the 12,600 is the weight on the axles or the total weight of the trailer(GVWR is listed as 14,000). Know the weight on the axles, preferably by each wheel position, and set the air to 5 lbs more than the inflation chart says based on the heaviest wheel.

70=2765, 75=2905, 80=3042, 85=3170, 90=3300, 95=3415, 100=3550, 105=3675, 110=3750

http://www.goodyearrvtires.com/pdfs/tire-care-guide.pdf

At 110 the four tires can carry 15,000 pounds. You do not need that!

Chris

Geez you sound just like me!

I totally agree! The load charts are there for a reason. I went from E's to G's and ran 85 for several thousand miles and the tires had perfectly even tread wear.

110 PSI will not cause any of the issues noted by meagain and will give you more stability at highway speed due to more sidewall rigidity. Set it and forget it.

110 PSI for 2+ years now no issues. 14K loaded weight