2023 ENTEGRA ETHOS Wheels Problems

I have a major issue with my 2023 Entegra Ethos Class B RV that I purchased new in June 2023 from La Mesa RV in Arizona. The vehicle currently has 14,083 miles. On a trip last week we began experiencing a severe vibration in the right rear of the van when driving highway speeds of 65 - 70 mph. I went to a tire store and was told that the tires are incorrect for the weight of this vehicle. Discount Tire has a policy that does not allow them to mount tires that do not meet the vehicle's specification. The left rear tire is bulging down the center to the point where it barely fits in the wheel well. The tire store manager said that it would explode in the near future if it continued to be used. The “Tire and Loading Information” sticker that Entegra applied over the original...