How To Michelin RV tire pressure chart PSI

[Stuart W]

Yesterday on our second trip in the new DS we hit one of those roads that = a 10.0 earthquake
When I got where I was going I checked my tire pressure cold:
Fronts 125 PSI (the max rating)
And all 6 rears at 95 PSI
As a starting point until I can get it weighed I obtained the weights as it left Newmar
I have tried to illustrate the process using the Michelin RV tire chart in the next 4 pictures (color coded)
I concluded that I would start at 105 fronts and 90 in all 6 rear tires.
Stuart

 

[Stuart W]

One more thing about tires, I’m not sure how many know this but for 2023 Newmar has eliminated the valve extensions for the rear inner duals. This makes checking PSI and inflating the inner duals a real pain in the butt. .

 

[Neal]

How do you access the stems on the inner duals? Good grief!!!

I realize our weights and all are different but I run 105 front and 90 rear on my VTDP which is well above chart pressure. I had corner weights done at my annual FL visit and the tech talked me into it and I ended up finding the ride was actually better at the higher pressure on the fronts.

You had me worried for a minute when a left coaster mentions QUAKE!

 

[DennisT]

Even on our 2022 SuperStar the rear inners did not have extensions.

Dealership added the rubber stabilizer and extensions ( or longer valve stems, need to verify ) so I could attach my TPMS easily. Know I’ll need to watch the rubber stabilizers but they should be the new design.

 

[Neal]

FL put the new ones on mine and they have worked great. Prior ones kept coming out. I think the new ones have a part of the stabilizer that actually goes down the stem somewhat for support which is a great idea.

 

[Stuart W]

How do you access the stems on the inner duals? Good grief!!!

I realize our weights and all are different but I run 105 front and 90 rear on my VTDP which is well above chart pressure. I had corner weights done at my annual FL visit and the tech talked me into it and I ended up finding the ride was actually better at the higher pressure on the fronts.

You had me worried for a minute when a left coaster mentions QUAKE!

Apparently they have deemed the exertions as a safety concern. Need a tool to remove the cap and then it’s a straight shot to the stem, still working on tools. The only big difference is on the 43 foot DS they run the 365 tires, I even added PSI over chart, I may end up at 110 on fronts.

 

[purring along]

I have been running 110 front,and 85 rear cold pressure now for two years nice ride.They say to weigh the coach, but with the constant water, and fuel changing I am not sure of that science working.

 

[Stuart W]

How do you access the stems on the inner duals? Good grief!!!

This is what I’m ordering

Amazon.com

Or even better this one plus cap tool

https://www.amazon.com/dp/B07F1BZ5FJ/?tag=rvf01-20

 

[Stuart W]

I have been running 110 front,and 85 rear cold pressure now for two years nice ride.They say to weigh the coach, but with the constant water, and fuel changing I am not sure of that science working.

The factory weights I used include fuel weight
Correction it does not include fuel in corner weights

 

[Neal]

Looking at your numbers it appears your left/right weights are close which is really nice. At FPU I think I was over 1000 off and they took the coach and made some adjustment. I don't know what the tolerance is but I don't think I've seen them as tight as yours.