Mile High wrote:
Instead, we got guys like FE over here that are convinced it is a criminal act to run anything but the exact ST tire the RV manufacturer put on the sticker in the left front!
I've never said that. That's just a perception you and many others get when reading quotes in my posts.
Being a Keystone product owner I often use the quote below from the pages of their owner's manual. It's an industry standard. If owner's chose not to follow it I often use the phrase "bigger is better".
To maintain tire safety, purchase new tires that are the same size as the vehicle’s original tires or another size recommended by the manufacturer. Look at the Tire and Loading Information label, or the sidewall of the tire you are replacing to find this information. If you have any doubt about the correct size to choose, consult with the tire dealer.FastEagle
On Edit: I've come back to add this little foot note. I have always strongly agreed with the industry standards that support the vehicle manufacturer's position on tire strength. It says in part that replacement tires must have equal or greater load capacity when compared with the OE tires. An owner has no defense what so ever when using replacement tires with less load capacity than the OE tires and they fail.