CSG
Explorer
I don't think too many (including installers) understand that to go from the stock P rated tires, you need to air up a lot more to carry the equivalent load ratings in your C, D, or E load rated tire. Running the factory inflation designed for a P tire in an E tire means you are seriously underinflating your E tire.
Here's an informative paper on the topic from Toyo: https://toyotires2-1524598101.netdna-ssl.com/assets/lib:toyo%20content/Application_of_Load_Inflation_Tables_20150623_Final.pdf
Here's an informative paper on the topic from Toyo: https://toyotires2-1524598101.netdna-ssl.com/assets/lib:toyo%20content/Application_of_Load_Inflation_Tables_20150623_Final.pdf