Just saw this post and wanted to add my experience. I just purchased the new HD tires, rating 81 mph, high load range E and got a good deal on them at discount tire. So far I have had 2 trips on them and love these tires. The eom ones fell apart at 4 years, was very spongy down the road. The camper would bounce a lot more. These new HD tires are very stable and pulling the camper with less bounce and grater stability. Granted they are range E verse the D I had before. Overall I was unsure about Carlisle tires but these have really changed my mind on them. I noticed a big difference in how the camper pulled in the mountains. It was very stable compared to before. Just my opinion, good luck on your purchase.
