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Old 09-26-2021, 09:01 AM   #1
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Tire pressure on an RV

Here is my question for the day. Do you maintain tire pressure in an RV as you would a regular vehicle tire. The rating on my RV tires are for 50 psi. Should I fill it to 50 or adjust to a little lower rating, say 47 psi ?
I have a 2017 Coachman Apex 21 RBK. Dry weight is 4700 lbs. Tire rating is a C and are 205/55/R14
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Old 09-26-2021, 09:02 AM   #2
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Sorry, we have no idea what RV you have, what the axles weight or where the 50 PSI recommendation comes from.


More details and perhaps we can assist.
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Old 09-26-2021, 09:12 AM   #3
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Tire pressure on RV tires

I have a 2017 Coachman Apex 21 RBK. Dry weight is 4700 lbs. Tire rating is a C and are 205/55/R14. The 50 psi is stamped on the tires from the manufacturer.
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Old 09-26-2021, 09:43 AM   #4
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Quote:
Originally Posted by NS Maritimer View Post
I have a 2017 Coachman Apex 21 RBK. Dry weight is 4700 lbs. Tire rating is a C and are 205/55/R14. The 50 psi is stamped on the tires from the manufacturer.
This is a sensitive topic , lots of opinions .

Regarding the tire sidewall pressure shown , this is for maximum weight carrying capacity .

Your dry weight is inconsequential as to tire pressure . What you need is the actual loaded weight on each axle to determine proper pressures.

Take that info , find the tire manufacturers tire pressure chart online to determine approved pressure for actual load .

Much more tire pressure info is available on this forum , just use the search function at the top of the page.
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Old 09-26-2021, 09:45 AM   #5
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Don't go by the pressure on the side of the tire! There should be a placard somewhere in your RV that shows the recommended tire pressures. Those will be the pressure recommended to carry the RV at gross weight. I would air to tires to that pressure first thing in the morning. Don't worry about the pressure rising as the tires get hot during the day. JMHO
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Old 09-26-2021, 09:53 AM   #6
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Quote:
Originally Posted by Bill Gail View Post
This is a sensitive topic , lots of opinions .

Regarding the tire sidewall pressure shown , this is for maximum weight carrying capacity .

Your dry weight is inconsequential as to tire pressure . What you need is the actual loaded weight on each axle to determine proper pressures.

Take that info , find the tire manufacturers tire pressure chart online to determine approved pressure for actual load .

Much more tire pressure info is available on this forum , just use the search function at the top of the page.
This. Go weigh your moho and refer to the tire charts.
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Old 09-26-2021, 10:07 AM   #7
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Here is what I did when I had a travel trailers. I had good years on most of them.

Until I knew the load on the tires, I would use the max load PSI on the side of the tire.

But once I knew the weigh I wanted a softer ride. I would reference goodyears inflation chart for "SP" tires. Get my tires loaded weight at a CAT scale or truck stop with scale Find my tire size and look up the psi to load and air up per the chart. Plus add the following, The following or any tire presure should no exceed the tire rated max PSI. I would add a buffer of 5+ PSI so I was not needing to add air every cool. One in awhile I find myself over 70 mph. I would add an additional 10+ PSI, for the goodyear traveling over 70 MPH service bulletin (I believe its a Canadian bulletin).
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Old 09-26-2021, 10:17 AM   #8
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I fill to almost max tire pressure on the tire on my trailer. That's because I don't care so much about wear. I care more about rolling easily and less heat build up. I don't do that with my tow vehicle, just my trailer. That has never failed me over a lot of years of pulling TT's.

I'll try to get closer to the right pressure for the old class A when I get it ready for the road. I might try the chalk test on it once I get everything done.
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