In the enclosed web site you will find a list of very informative tire publications from Michelin. Keep in mind that when they are talking about RV tires they are only referring to tires used on self propelled RVs.
On page 37 of the truck tire service manual you will find a paragraph that addresses Michelin’s position on the use of 100% nitrogen in their tires.
Michelin Americas Truck Tires Reference Materials Page