OK here is the story about the new HD tire. I talked to the corporate office today. The HD is due to roll out in mid May. When I told the lady that Discount already had them, and I was going to get them put on the RV today, she was shocked.Nobody is supposed to have them until mid month. Guess money talks if you are Discount Tire. The web site is not updated to reflect the HD tire yet. The new HD will have improved tread wear, increased heat resistance, longer durability,and a higher speed rating. Eventually the RH model will go away.