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Re: Tire pressure question - without scales

Reply #40 –
Quote from: D.J. Osborn –
The short answer is that you finally have the right idea.
Yeah, I am kind of slow. Funny that in two MICHELIN RV publications they would say that the tire pressure on the tire sidewall is the MAXIMUM tire pressure, but in their TRUCK TIRE publication they would give contradictory information. Be advised that the 22.5 inch size tires for RVs are listed in their RV publications.

Re: Tire pressure question - without scales

Reply #41 –
Quote from: ltg –
Funny that in two MICHELIN RV publications they would say that the tire pressure on the tire sidewall is the MAXIMUM tire pressure, but in their TRUCK TIRE publication they would give contradictory information. Be advised that the 22.5 inch size tires for RVs are listed in their RV publications.
The tires on our Foretravels are definitely truck tires and therefore conform to the Federal Motor Vehicle Safety Standard that controls truck tires. Thus, while any RV publication might have some useful information, the Michelin Truck Tire Safety Manual is the "bible" regarding our Foretravels' Michelin tires.

Re: Tire pressure question - without scales

Reply #42 –
Quote from: D.J. Osborn –
the Michelin Truck Tire Safety Manual is the "bible" regarding our Foretravels' Michelin tires.
Would you please provide a link to the "Michelin Truck Tire Safety Manual."

Re: Tire pressure question - without scales

Reply #44 –
It really doesn't matter whether a given culumn in a table in this document is correctly or incorrectly labeled. The important and accurate information is clearly stated in several places in the Michelin Truck Tire Safety Manual. In addition, look at your motorhome's tires' sidewalls and you will NOT see "maximum pressure" on the sidewall, while you WILL see "maximum load" there.

Re: Tire pressure question - without scales

Reply #45 –
Quote from: D.J. Osborn –
It really doesn't matter whether a given culumn in a table in this document is correctly or incorrectly labeled. The important and accurate information is clearly stated in several places in the Michelin Truck Tire Safety Manual. In addition, look at your motorhome's tires' sidewalls and you will NOT see "maximum pressure" on the sidewall, while you WILL see "maximum load" there.
Please read the text on the top of page 13. This is the page for RV tires that are on some Foretravels. It is not only whether a table is incorrectly labeled. This text clearly states maximum tire pressure.

Re: Tire pressure question - without scales

Reply #46 –
Quote from: ltg –
Please read the text on the top of page 12. This is the page for RV tires that are on some Foretravels. It is not only whether a table is incorrectly labeled. This text clearly states maximum tire pressure.
Youu may choose whether or not to believe the Michelin Truck Tire Safety Manual. Our Motorhome tires are truck tires and must conform to the Federal Motor Vehicle Safety Standard that governs truck tires. I must ask you once again to read the sidewall of your motorhome time and look for the phrase "Maximum Pressure." You won't find it because the sidewal of our truck tires on our Foretravels does NOT show the tire's maximum pressure! It lists the minimum pressure for the maximum load.

Re: Tire pressure question - without scales

Reply #47 –
Quote from: D.J. Osborn –
Youu cmmay choose whether or not to believe the Michelin Truck Tire Safety Manual. Our Motorhome tires are truck tires and must conform to the Federal Motor Vehicle Safety Standard that governs truck tires. I must ask you once again to read the sidewall of your motorhome time and look for the phrase "Maximum Pressure." You won't find it because the sidewal of our truck tires on our Foretravels does NOT show the tire's maximum pressure! It lists the minimum pressure for the maximum load.
What you do not seem to understand is that when Michelin truck tires are put on a RV, they fall under Michelin RV tires rules. The top of the Michelin RV tire charts clearly State, "Michelin Inflation Charts For RV Use Only."

Re: Tire pressure question - without scales

Reply #48 –
Quote from: ltg –
What you do not seem to understand is that when Michelin truck tires are put on a RV, they fall under Michelin RV tires rules. The top of the Michelin RV tire charts clearly State, "Michelin Inflation Charts For RV Use Only."
Not true! You may choose to believe any falsehood you like--but that doesn't change the truth. Look at your tire's sidewall: Does the phrase "maximum pressure' suddenly appear because it knows it's on a motorhome? Nope! The tire is still built to the requirements of FMVSS 119 because it's a truck tire. It doesn't know whether it's on a truck, a motorcoach or a motorhome!

Re: Tire pressure question - without scales

Reply #49 –
"G" rated?  107 front .97 rear.

That's for my U320.  You will be 5-8 pounds high for your actual weight but will ride and steer  well.

Only for Michelin's.  Probably good for others.

Subtract 10 pounds if "H " rated tires installed which would be weird

Re: Tire pressure question - without scales

Reply #50 –
OK, how about we stop quibbling about what boils down to semantics. 

I think we can all agree on ways to determine the correct tire pressure for our coaches.

Thanks.

Re: Tire pressure question - without scales

Reply #51 –
Brett has good advice for trip home, but you also want to check if the tires on the coach are same weight rating and size as OEM. A lower range tire would need more air. Also check date of manufacturing. Old tires will blow.  I made tires a part of my purchase, and made sure they were the same load rating as OEM. The tire dealership put 110 pounds in them and I pounded my way home over every pavement strip from Wichita to Dallas. I downloaded the Data sheets for the tires, ended up letting a lot of air  out and the ride improved greatly.  Also had a sleepless night when I highlighted the metric rating for the tires instead of the pounds rating.  Big difference between kilograms and pounds, I thought my tires were way undersized.  As others will recommend, try to drive home in the daylight because the headlights are terrible.

Re: Tire pressure question - without scales

Reply #52 –
That is really good advice, the tire rating as well as the pressure
Thanks