Just had all five Towmax tires on our 2014 BH3010RE replaced with Sailun 637's yesterday. After almost 40,000 K, we have to say that we had no issues with the Towmax in that time. It would appear from earlier posts that we were among the lucky ones. The Sailun's look good and we are hoping that we never have to change a tire on the road as they are significantly heavier to handle than the old Towmax. Now the original BFG on our TV are looking like they would like to be replaced. Looking at the Michelin Defender series as they seem like they would be better suited to the highway hauling than the BFG's.