Michelin Tire Pressure Ratings

Wildride64 wrote:
I do not like standardized tables, I want specific information for the tires that I have. I don't use the Powerstroke diesel maintenance schedule for my Duramax even though they are both diesel engines and effectively operate in the same way. I am sure that there are people who feel the same as me so I wanted to share this information. If you do not want or need it that is fine also.

As you see on the Toyo list the loadcapacity's are exactly the same within some rounding to 5 lbs different.

This shows that Michelin also used the standard calculation used in America for LT- and trucktires.

If you can handle some math that formula is
(Actual pressure/ AT- Pressure)^ 0.7 x maxload= loadcapacity ( for actuall pressure).

Because these lists are often made for KG and kPA and the rounded off .
Then conversed to PSI and LBS and again rounded, the given loadcapacity's are not exactly what would be calculated.

The ^ 0.7 is the difficult part , but means to the power, like ^2 is square and ^1/2 so ^ 0.5 is root . ^1 is same as using no power so lineair calc.

Strange is that Michelin uses in Europe the ^0.8 wich is used here for every kind of tire for decades, and this officiall formula I got hold of in 2008 and went running with.

This EUR calc leads to lower loadcapacity for the actual pressure.
America stepped over to the EUR calc ( ^ 0.8) as late as 2006, but only for P tires in SL and XL , before USA used ^ 0.5 so root for P tires. This would give for half of At pressure ( your 80 psi) 71% of maxload as loadcapacity. EUR calc gives then 57% of maxload as loadcapacity. Draw your own conclusions.

Now dont have the time ,but will give link of my made formula, wich is even saver.