If the RV came original equipment with a ST tire, we do not recommend replacing with a light truck tire as this would be considered a misapplication. There is no warranty for misapplication.
Please let us know if you have additional questions.
Thank you for contacting Michelin.
It is our goal to ensure that your issue has been resolved or your question answered to your satisfaction. If we can assist you further, please respond to this email or call us at 1-800-642-4354 (toll free) between 8:00AM and 8:00PM Eastern Time Monday through Friday or between 8:30AM and 4:30PM Eastern Time on Saturday.
Sincerely,
Consumer Care Department
Certified Michelin Product Expert
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Alan