Tire Pressure

[LarPar2012]

Have a 36' Monaco LaPalma and was wondering if there is a recommended tire pressure for the rear and front, what would be considered the best for safety? Thanks!

["007"]

Get your coach weight for your travels and use tire pressure tables for what ever tires you have.
Until you do that use tire PSI posted on sticker label near driver seat on wall.

Michelin tire

Goodyear

[Steve Ownby]

Originally Posted by LarPar2012

Have a 36' Monaco LaPalma and was wondering if there is a recommended tire pressure for the rear and front, what would be considered the best for safety? Thanks!

Hey Larry,

Hope you've had a nice summer & taken some fun trips.

The very best thing would be to have your coach weighed at each corner or at least each axle. Find a tire inflation table for your specific tire and inflate to the pressure required to carry the load. To be safe if you haven't been weighted, inflate to the pressure required to carry the GAWR(gross axle weight rating).

I looked up the La Palma and there are several GAWR which were used. Here is a pretty common one:

Steer axle: GAWR 8000 pounds. 235/80R22.5 tires inflated to 95-100 psi
Drive axle: GAWR 15,500 pounds 235/80R22.5 tires inflated to 95-100 psi

These inflations will be safe and if you get weighed you can adjust them.

Here is a Michelin tire data book:

http://www.michelinrvtires.com/asset...esBrochure.pdf

Safe travels.

[LarPar2012]

Originally Posted by Steve Ownby

Hey Larry, Hope you've had a nice summer & taken some fun trips. The very best thing would be to have your coach weighed at each corner or at least each axle. Find a tire inflation table for your specific tire and inflate to the pressure required to carry the load. To be safe if you haven't been weighted, inflate to the pressure required to carry the GAWR(gross axle weight rating). I looked up the La Palma and there are several GAWR which were used. Here is a pretty common one: Steer axle: GAWR 8000 pounds. 235/80R22.5 tires inflated to 95-100 psi Drive axle: GAWR 15,500 pounds 235/80R22.5 tires inflated to 95-100 psi These inflations will be safe and if you get weighed you can adjust them. Here is a Michelin tire data book: http://www.michelinrvtires.com/asset...esBrochure.pdf Safe travels.

Well hello!! Great to hear from you! The last travels were to a wonderful place in Hilton Head! My MH has been in the shop for six months....a very long story...it's been a true nightmare, not the MH but where I took it. One thing I was having installed was one of the tire monitors and that was the reason for my question. Thanks so much for this great information!! Where can I get the MH weighed?

If I get the MH back I am planning a trip to TN and NC the end of November.

How are you and the family? Hope all is well!!

Take care and thanks again!!

Larry

[LarPar2012]

Originally Posted by Steve Ownby

Hey Larry, Hope you've had a nice summer & taken some fun trips. The very best thing would be to have your coach weighed at each corner or at least each axle. Find a tire inflation table for your specific tire and inflate to the pressure required to carry the load. To be safe if you haven't been weighted, inflate to the pressure required to carry the GAWR(gross axle weight rating). I looked up the La Palma and there are several GAWR which were used. Here is a pretty common one: Steer axle: GAWR 8000 pounds. 235/80R22.5 tires inflated to 95-100 psi Drive axle: GAWR 15,500 pounds 235/80R22.5 tires inflated to 95-100 psi These inflations will be safe and if you get weighed you can adjust them. Here is a Michelin tire data book: http://www.michelinrvtires.com/asset...esBrochure.pdf Safe travels.

Btw I have been running 90 or 95 in the front and 85 in the rear. If I recall that is what the sticker said in the MH.

[Steve Ownby]

Originally Posted by LarPar2012

Btw I have been running 90 or 95 in the front and 85 in the rear. If I recall that is what the sticker said in the MH.

I hate stories involving incompetent RV service. Unfortunately they are all too common. The psi on the placard in the motorhome should be ok for your axle weight. I guessed on the high end because there were several axles available.

You can get weighed at a truck stop ( look for Cat scales.) or at a Coop or moving company. Lots of places weigh trucks.

You're smart to get a TPMS. I'm a believer.

We're currently down in the Keys. Have fun on your trip.

[Passin Thru]

Just run 95 which we used for a standard on 22.5 in tires on big trucks. Look on the tire, it tell you what P to run.

[LarPar2012]

Originally Posted by Steve Ownby

I hate stories involving incompetent RV service. Unfortunately they are all too common. The psi on the placard in the motorhome should be ok for your axle weight. I guessed on the high end because there were several axles available. You can get weighed at a truck stop ( look for Cat scales.) or at a Coop or moving company. Lots of places weigh trucks. You're smart to get a TPMS. I'm a believer. We're currently down in the Keys. Have fun on your trip.

Thank you! Enjoy the Keys! Keep in touch!

[LarPar2012]

Originally Posted by Steve Ownby

Hey Larry, Hope you've had a nice summer & taken some fun trips. The very best thing would be to have your coach weighed at each corner or at least each axle. Find a tire inflation table for your specific tire and inflate to the pressure required to carry the load. To be safe if you haven't been weighted, inflate to the pressure required to carry the GAWR(gross axle weight rating). I looked up the La Palma and there are several GAWR which were used. Here is a pretty common one: Steer axle: GAWR 8000 pounds. 235/80R22.5 tires inflated to 95-100 psi Drive axle: GAWR 15,500 pounds 235/80R22.5 tires inflated to 95-100 psi These inflations will be safe and if you get weighed you can adjust them. Here is a Michelin tire data book: http://www.michelinrvtires.com/asset...esBrochure.pdf Safe travels.

Got the MH weighed and it's 21900.

[LarPar2012]

Originally Posted by Steve Ownby

I hate stories involving incompetent RV service. Unfortunately they are all too common. The psi on the placard in the motorhome should be ok for your axle weight. I guessed on the high end because there were several axles available. You can get weighed at a truck stop ( look for Cat scales.) or at a Coop or moving company. Lots of places weigh trucks. You're smart to get a TPMS. I'm a believer. We're currently down in the Keys. Have fun on your trip.

Got the MH weighed and it's 21900

[Steve Ownby]

Originally Posted by LarPar2012

Got the MH weighed and it's 21900

That's a start but you need to know the weight on each axle to know how to inflate the tires.

[Mr_D]

Originally Posted by Passin Thru

Just run 95 which we used for a standard on 22.5 in tires on big trucks. Look on the tire, it tell you what P to run.

You can't just "guess" at the correct pressure, the ONLY way to determine the correct pressure is four "corner" weights and use the tire manufacturers weight/pressure charts for that model tire. Nothing else is correct.

The pressure on the sidewall of a Michelin RV tire and many others is not the "Maximum" the tire should ever have (unlike car tires) it is the minimum to support the maximum rated carrying capacity of the tire.

From the Michelin RV Tire Guide:

"If you look at the tire's sidewall, you'll see the maximum load capacity allowed for the size tire and load rating, and the minimum cold air inflation needed to carry the maximum load."

From page 6 of the GoodYear RV Tire and Care Guide:

"How much air is enough?
The proper air inflation for your tires depends on how much your fully loaded RV or trailer weighs. Look at the sidewall of your RV tire and you’ll see the maximum load capacity for the tire size and load rating, as well as the minimum cold air inflation, needed to carry that maximum load."

From TOYO:

Inflation Pressure Safety Margin
Toyo Tire does not recommend an “inflate-to-the-load” policy for RV tires. Tires that are inflated to accommodate the vehicle’s actual loads do not have any inflation safety margin. Consequently, even a minor loss of air pressure will cause the tires to be under-inflated and overloaded. Toyo Tire’s policy is to observe (as a minimum) the tire pressure established by the vehicle manufacturer as indicated on the tire information placard. There are multiple reasons why a safety margin
(by inflation) makes sense:
• All tires lose about 1-1.5 PSI per month due to natural permeation of the tire’s internal air pressure through the tire’s rubber membrane.
• In the event of slow air leaks from punctures, an inflation “reserve” may allow detection and repair of the leak prior to reaching a dangerously low inflation level.
• A safety margin is prudent for users who are apathetic regarding tire inflation maintenance.

But then they go ahead and publish a weight/pressure chart allowing lower pressure for RV's!!

From the August 2010 Motorhome Magazine "Tread Carefully" tire article:

The maximum load capacity allowed for the size tire and load rating and the minimum cold air inflation needed to carry that maximum load are located on the tire’s sidewall.

[Arch Hoagland]

On my 2004 La Palma 36 DBD I run 90lb on all tires.

According to the Michelin tire chart I can run lower in the rear for my weights but I like a few extra pounds of pressure.

[Mr_D]

Originally Posted by Arch Hoagland

On my 2004 La Palma 36 DBD I run 90lb on all tires.

According to the Michelin tire chart I can run lower in the rear for my weights but I like a few extra pounds of pressure.

Lots of people (me included) run 5 psi higher. That allows for some leakage without having to fill the tires everytime they drop a few psi.