Well, After two flats, a blowout and a tread separation which was ready to blow (found when getting four new tires) I got rid of my 2 yr old Carlisle RH's. These were true to the name "China Bomb". No problems for a year, and about 5,000 miles, but then this summer, nothing but grief. The blowout took my fender, and was in 105* heat in the middle of Nowhere with no cell service just after my wingman passed me and kept going.
I run 215/75 R14's so no D range tires available for me. Went with the HD's this time. I could feel immediately leaving discount tire and driving around the lot and entering the freeway, that these are stiffer and more stable. Hopefully I will get 2+ years out of these. The RH's felt like jello.
Let's hope these are the real deal. I had a motorhome before with 16's and ran Michelin LTX's with load range E. WIsh I could get them in 14's. Can't go larger or my tires would rub together.