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Michelin tire pressure - what are your's set to?

Yahoo Message Number: 89355
Tire pressure question ? I replaced the original Toyo tires with Michelins. If I use the Michelin inflation guide, the tires will be inflated to a much lower pressure than with the Toyo's. For example, the Michelin guide shows the duals should be at @ 75PSI (12R22.5 LRH XZE, 18,540 lbs/2 = 9,270 lbs per set of duals).

For the Michelin users, what is the inflation pressure you use?

Gary C

2005 Magna, 42'

Re: Michelin tire pressure - what are your's set to?

Reply #1 –
Yahoo Message Number: 89356
If you will read the fine print, Michelin says to add ten lbs of pressure if you drive over a specific speed. The also recommend a certain amount of margin if you are changing altitudes and ambient temperatures. Remember the temps recommended for air pressure is around 68 deg F. If you are operating at lower temps you have to raise the pressure if you are measuring at 68 degrees. Watch the wear on your front tires and tags and you'll find in order to make the tread wear even across the tire you are going to use CC recommend air pressures.
TWI 2004 Intrigue 11731, Toyos. Michelin and Now Continentals.

Re: Michelin tire pressure - what are your's set to?

Reply #2 –
Yahoo Message Number: 89358
Thomas, I don't understand the following sentences you just shared.
Remember the temps recommended for air pressure is around 68 deg F. If you are operating at lower temps you have to raise the pressure if you are measuring at 68 degrees.

Please explain. Thanks,
Lee

Re: Michelin tire pressure - what are your's set to?

Reply #3 –
Yahoo Message Number: 89360
Around freezing the pressures really start to drop off has been my Experience when I used Michelin tires for my truck and Airstream TT. We spent a lot of time in the panhandle, northern New Mexico and Colorado. And while I normally ran 60 lbs for the TT and 75 for the truck I would have to add 10 to 15 llbs to the truck and 10 lbs to the trailer to maintain the same profile when below freezing. More when around Zero degrees. When we had that spell of over 72 ours below zero last year I had to add over 25 lbs to keep the same profile and return the tires to 115 lbs while parked. When the temps warmed to above freezing I returned the tires to their original pressures at 65 degrees. TWI 84 Airstream 34' Limited, now 2004 Intrigue 11731

Re: Michelin tire pressure - what are your's set to?

Reply #4 –
Yahoo Message Number: 89366
Thomas, your point is well taken for tires running in the 60-70 PSI range or for those extreme temperature conditions and if you had water/water vapor in with the air. However, I'd contend those extreme termperture conditions/events are rare for the vast majority of coach owners. And we're not running trailer tires.

The Laws of Nature tell us that dry air in a tire will drop by 1.8 PSI for every 10 degrees Fahrenheit. If we're using the 10 extra PSI safety guide, then you'd still be in the safety zone down to 15 degrees Fahrenheit. I conclude that the temperate extreme situation can be ignored unless you encounter temperatures approaching zero Fahrenheit.

Lee

Re: Michelin tire pressure - what are your's set to?

Reply #5 –
Yahoo Message Number: 89384
Intresting comments, however no one told me their pressure settings.

Gary C

Re: Michelin tire pressure - what are your's set to?

Reply #6 –
Yahoo Message Number: 89385
Gary,

I have 12R's Michelin XZE* tires.
Front 105psi

Drive & Tag 100psi

But, until you get your own specific RV's four corner weight, I recommend you run the higher PSI that is on your coach label.
Each year and model and sub model have different configurations, so what is right for my coach ready to roll, may not be the same for your coach.
And, each tire (not just Michelin all up, or Goodyear all up) could have different PSI settings based upon actual weight.

That's my opinion:)!

Be safe, and good luck on determining the PSI you will run, Smitty

04 Allure 40' Tag
04 Allure Sold to a nice new owner! Now enjoying a 07 Magna Rembrandt 45' ISX600 #6775
"We're ONDROAD for THEJRNY!" (Toad and Coach license plates, say Hi if you see us!)

Re: Michelin tire pressure - what are your's set to?

Reply #7 –
Yahoo Message Number: 89387
That information would be of no use to you Gary.
Every coach is different . . . too many variables . . .no right answer.

So tell us this -

Weight at each tire position; 4 numbers or 6 with a tag;

Tire brands at each position and size.

The tire brand charts will tell what the pressures should be.

Lee

Re: Michelin tire pressure - what are your's set to?

Reply #8 –
Yahoo Message Number: 89389
When I ran XZ2 michelin size 12 R, I ran 115 lbs front 110 tag and 118 tag. My coach weighed 40,500 lbs at the time with 13,750 on the front axle. Now I run 315R's and still run the same pressures, not that I need to, but the wear on the front axle and tag stay more uniform that way. TWI 2004 intrigue 11731

Re: Michelin tire pressure - what are your's set to?

Reply #9 –
Yahoo Message Number: 89397
Hello

Michelin xza front 109 and xze rear 103 with crossfire. weight front 11010 and the rear left 10080 and rear right 10810 this was fully loaded with water, fuel and supplys. Hope this helps.

Rod

05 inspire
51473