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Old 06-09-2019, 12:08 PM   #1
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Recommended tire pressure for 5th wheel trailer

What is recommended tire pressure for my 5th wheel? Running Good Year Endurance tires on my Signature Ultra Lite (6600 lbs dry and approx. 8600 loaded)...sticker on 5th wheel states 50 psi cold and max cold pressure on tire states 80 psi. That is a big range! Suggestions?
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Old 06-09-2019, 12:15 PM   #2
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I'm going to assume your rig came with class C tires and not the Endurance tires. Trailer tires are normally inflated to the max sidewall pressure cold.
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Old 06-09-2019, 12:16 PM   #3
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Originally Posted by Arndog View Post
What is recommended tire pressure for my 5th wheel? Running Good Year Endurance tires on my Signature Ultra Lite (6600 lbs dry and approx. 8600 loaded)...sticker on 5th wheel states 50 psi cold and max cold pressure on tire states 80 psi. That is a big range! Suggestions?
Sounds like the tires are not the same size/load range as the originals that are described on the sticker?
Also, this topic is a regular, well beaten, subject. Search for some other lengthy threads and get more comments that you will need.
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Old 06-09-2019, 12:55 PM   #4
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Yes, came with different tires, but I always thought you go with the pressure on the vehicle/trailer sticker...is that not correct?
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Old 06-09-2019, 01:02 PM   #5
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Originally Posted by Arndog View Post
Yes, came with different tires, but I always thought you go with the pressure on the vehicle/trailer sticker...is that not correct?
For the original size tires specified on the sticker. Not a different size/load range.
Most of us run the max cold psi on the side of the tire for towables. Period.
Others will reduce that psi according to load tables for the particular tire. They say they do this for a better ride. It's a towable, ride has never been a concern of mine.
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Old 06-09-2019, 01:39 PM   #6
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Originally Posted by NMWildcat View Post
For the original size tires specified on the sticker. Not a different size/load range.
Most of us run the max cold psi on the side of the tire for towables. Period.
Others will reduce that psi according to load tables for the particular tire. They say they do this for a better ride. It's a towable, ride has never been a concern of mine.
Not necessarily for better ride but more tire contact with the road for braking. If you inflate a tire more than necessary to carry the rated load of the trailer the tire isn't necessarily providing all the traction needed to stop properly.

There's a reason why tire load tables are published.
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Old 06-09-2019, 01:48 PM   #7
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Originally Posted by TitanMike View Post
Not necessarily for better ride but more tire contact with the road for braking. If you inflate a tire more than necessary to carry the rated load of the trailer the tire isn't necessarily providing all the traction needed to stop properly.

There's a reason why tire load tables are published.
I could see this possibly making sense if you upgrade to a tire with considerably more load capability than the trailer weight, or for a very light trailer. Then you will see uneven wear patterns (center).
But for heavier trailers, I really don't see psi set by actual load vs max cold psi, making enough difference in actual tire contact to affect braking. But, that's just me and my experience.
I always go up a load range from original, and always use max cold psi on the tire, for towable RVs. I'm too lazy to determine actual weight per trip and adjust psi accordingly to a table. Works for me, everyone has to decide for themselves.
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Old 06-09-2019, 03:43 PM   #8
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Originally Posted by NMWildcat View Post
I could see this possibly making sense if you upgrade to a tire with considerably more load capability than the trailer weight, or for a very light trailer. Then you will see uneven wear patterns (center).
But for heavier trailers, I really don't see psi set by actual load vs max cold psi, making enough difference in actual tire contact to affect braking. But, that's just me and my experience.
I always go up a load range from original, and always use max cold psi on the tire, for towable RVs. I'm too lazy to determine actual weight per trip and adjust psi accordingly to a table. Works for me, everyone has to decide for themselves.

This apparently is the case with the OP's situation. Sticker calls for 50 PSI and tire sidewall shows 80 PSI max. That's a 60% increase in pressure without a corresponding increase in load weight.

If one has a heavier trailer that came with a marginal tire then upgrading to the next load rating makes sense. This often means an increase from 50 PSI to 65 PSI (LR-C to LR-D, average) which is only a 30% increase in pressure which might match the trailer weight better than the original tire.

The Mythbuster's motto of "Anything worth doing is worth overdoing" doesn't always hold true with tires.
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Old 06-09-2019, 05:07 PM   #9
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Found a load/inflation table from Good Year for their Endurance tire at https://www.goodyearrvtires.com/pdfs/rv_inflation.pdf. Shows the pressure I need for my max load is 50psi.
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Old 06-10-2019, 03:33 PM   #10
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Always go with the Max Cold Pressure on the Tires and not on the rig.
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