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Old 03-13-2018, 02:55 AM   #1
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The Question That Seems to NEVER BE ANSWERED!

I have installed brand new Sailun 17.5 H Tires on my Pride and Joy Redwood 38RL.

Now, I have always run a TPMS to keep track of all my tires, both on the tow vehicle and the RV.

I would love to know what is an acceptable increase in Tire Pressure after the Tires warm up while traveling.

The Sailuns are a 125psi Cold Tire Pressure, which is where I have them set.

Naturally the tire pressure will increase as you go down the road. On a short trip this weekend, I was seeing pressures around 135 to 140 psi and I think that is acceptable.

I've been told by experts (BIG QUESTION MARK) that an increase of up to 15 percent of your cold tire pressure is acceptable.

I wish I could find a good answer on this matter and I have searched hi and low for the information.

So, If someone has some good information I would really appreciate it!

Thanks,

JT
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Old 03-13-2018, 05:35 AM   #2
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I'm curious as well & have seen 140 a few times.
I just make sure that both on the same side are running about the same pressure as the sunny side runs hotter so also higher temps.
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Old 03-13-2018, 10:50 AM   #3
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Finally, I got an Answer!

Well, I finally got an answer! One that I can live with and seems very reasonable.

For those who read RVTRAVEL.COM, there is a gentleman by the name of Roger Marble from RV Tire Safety who wrote back concerning this issue. Roger is a true Tire Expert, who worked in the Tire Industry for 40 years.

At any rate his response was re-assuring. Here is what he said:

From: Roger M
Sent: Monday, March 12, 2018 8:37 PM
To:
Jeff
Subject: Re: Safe Tire Pressure after running for hours on the highway?


The general consensus is +20 to 25%

So, this was a real comfort to hear and that my tires are not heating up too much or have too much pressure that could cause a blow out!

Now on to Morryde this summer and having the Independent Suspension put on the RV. Looking forward to that!
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Old 03-13-2018, 09:17 PM   #4
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I do not run my 17.5 tires on our Redwood at full sidewall rated pressure as I do not have a wheel weight of sidewall capacity of 4650 lbs. as the tire shows at full pressure, our actual wheel weight is around 3600 to 3800 lbs. per tire so I run 105 to 110 psi in our 17.5 tires.
Makes the trailer ride a smoother running at the lower pressure.
Go to Goodyear's website and they show the recommended pressure for the different actual weights / loads on the tires.

Same on our RAM 3500, I do not run the tires at full sidewall rated pressure of 80 psi, if I did I would not have any teeth left.
I run the fronts at 70 psi and the rear dual tires at 65 psi. (truck rides much better)
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Old 03-14-2018, 05:44 AM   #5
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Same here. I run our 17.5 Sailun at 110-115. And we're loaded heavy. I'm at right around 3800-3850/ tire.
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