lpennock
Senior Member
- Joined
- Nov 17, 2018
- Posts
- 494
- Reaction score
- 338
- Location
- Phoenix, AZ
- Ram Year
- 2018
- Engine
- 5.9L & 6.7L Cummins
Remember that unless there is a specific speed rating on the trailer tires they are only rated for 65mph. 65-75mph requires raising the cold pressure by 10psi and above 75 requires derating the load rating by 10%. Both of those derating techniques imply you have pressure and load margin. Most RV tires are running right at maximum load rating so you can't derate.
There are trailer tires that do have 80 or 90mph speed ratings but most oem RV don't put them on.
Bottom line stay a 65mph or less when towing. Your fuel mileage and tires with thank you.
There are trailer tires that do have 80 or 90mph speed ratings but most oem RV don't put them on.
Bottom line stay a 65mph or less when towing. Your fuel mileage and tires with thank you.