Thanks for the advice in advance. I have a two parter although somewhat related.1. I recall reading somewhere a long time ago that my recommended tire pressure on my 25ft class C is 80 per tire. I have kept them at 80 and so far so good. My friend, a long time RV'er says he thinks that is too high and he has rarely been wrong with his RV advice in the past. He says when he kept his class C tires at 80 he would get frequent blow outs. Any thoughts? 2. It seems every time I go to get my RV ready for a trip at the storage place, all 6 tires are at 75 and I have to add 5 to each tire to get them to 80. Today one of the valve stems wouldn't allow me to add air or check the pressure in one of the rear, inside tires. I am guessing I just need to (finally) get a valve stem tool and tighten the valve stem perhaps? Any thoughts? This is a metal valve stem extender btw. Thanks again!

There should be a label near the pilot's door specifying the tire pressures for front, rear and spare.If you don't already have them, I recommend the valve extenders, which are steel braided lines that look like brake lines and give you easy access, especially to the inside pairs.

The tires themselves will have a max cold air pressure. This is what should not be exceeded and will give you the best wear and load bearing ability. You might have had someone change the tires from the originals. Check on the tire.

The recommended tire pressure on the door is the cold air pressure. On a final 300 mile leg coming home one time, I picked up a large nail in the right inside dually. No blowout as the nail stayed in the tire, but I had no idea how many miles I drove with only one rear dually inflated. After that, I had a TPMS (Tire Pressure Monitoring System) installed along with two new right rears and metal inflation stems all around. I was surprised by how much the tire pressures rise as the tires heat up when on the road. I also added a mounted inflated spare to the rear storage compartment and a roadside assistance card to my wallet. To help make room for the spare, I removed the entire set of metric tools I had stored in there, along with other stuff that I would never need or didn't know how to use.

Gonzo42 wrote:There should be a label near the pilot's door specifying the tire pressures for front, rear and spare.If you don't already have them, I recommend the valve extenders, which are steel braided lines that look like brake lines and give you easy access, especially to the inside pairs. Don't put to much faith in that door jam sticker! My sticker recommends 73 lbs. 73 lbs, got to be kidding! We're near or at max gross on our 31' C so its 80 lbs on all tires. Only a scales can tell you for sure what to air the tires to. I went to a CAT scale at a truck stop the first time, what a surprise that was... Since then I've had it weighed at one of the escapees smart weigh sites. We're better now.I had the braided extenders until one had the rubber inside fail and I could not fill or check pressure any more. I went to Borg stainless steel extenders and have had good luck with those. Kind of depends on which you prefer I think.Dave

J- Listen to Dave.... The door tag on any C is useless.Do not believe what anybody tells you that is not looking at your weigh slip. That person is just guessing. Go find a truck scale and pay the money to get the coach weighed. Then take the weigh slip to a tire dealer or go on the web and find out what the inflation pressure for you tires should be. This alone will give you the best of everything all around. Matt

tire pressure and valve stem issues | Good Sam Community

15 Replies

Matt_Colie
Explorer II
Mar 09, 2016
J-

Listen to Dave....
The door tag on any C is useless.
Do not believe what anybody tells you that is not looking at your weigh slip. That person is just guessing.

Go find a truck scale and pay the money to get the coach weighed. Then take the weigh slip to a tire dealer or go on the web and find out what the inflation pressure for you tires should be. This alone will give you the best of everything all around.

Matt
harley-dave
Explorer II
Mar 09, 2016
Gonzo42 wrote:
There should be a label near the pilot's door specifying the tire pressures for front, rear and spare.

If you don't already have them, I recommend the valve extenders, which are steel braided lines that look like brake lines and give you easy access, especially to the inside pairs.
Don't put to much faith in that door jam sticker! My sticker recommends 73 lbs. 73 lbs, got to be kidding! We're near or at max gross on our 31' C so its 80 lbs on all tires. Only a scales can tell you for sure what to air the tires to. I went to a CAT scale at a truck stop the first time, what a surprise that was... Since then I've had it weighed at one of the escapees smart weigh sites. We're better now.

I had the braided extenders until one had the rubber inside fail and I could not fill or check pressure any more. I went to Borg stainless steel extenders and have had good luck with those. Kind of depends on which you prefer I think.

Dave
Jim_Shoe
Explorer
Mar 09, 2016
The recommended tire pressure on the door is the cold air pressure. On a final 300 mile leg coming home one time, I picked up a large nail in the right inside dually. No blowout as the nail stayed in the tire, but I had no idea how many miles I drove with only one rear dually inflated. After that, I had a TPMS (Tire Pressure Monitoring System) installed along with two new right rears and metal inflation stems all around. I was surprised by how much the tire pressures rise as the tires heat up when on the road.
I also added a mounted inflated spare to the rear storage compartment and a roadside assistance card to my wallet. To help make room for the spare, I removed the entire set of metric tools I had stored in there, along with other stuff that I would never need or didn't know how to use.
dalenoel
Explorer II
Mar 09, 2016
The tires themselves will have a max cold air pressure. This is what should not be exceeded and will give you the best wear and load bearing ability. You might have had someone change the tires from the originals. Check on the tire.
Gonzo42
Explorer
Mar 09, 2016
There should be a label near the pilot's door specifying the tire pressures for front, rear and spare.

If you don't already have them, I recommend the valve extenders, which are steel braided lines that look like brake lines and give you easy access, especially to the inside pairs.

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tire pressure and valve stem issues

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