[wingnut60]

Have used the S637s for a trip to Alaska, and many more miles on my former '05 Suites, would not hesitate to get them again.
Had GY G114s on the '15 when bought, had tread separations on 2 of the 4 tires. Could not get the Sailuns, but did get Cooper RM 170s in the 6050lb rating.
Goodyears are good tires, but basically, you can buy 2+ sets of Sailuns/Coopers for the price of one GY set---if you listen to others on trailer damage due to throwing a tread, but want it covered, then get the GYs. If you want to get Sailuns/Coopers and buy a new set at 3 years, that is what I intend to do...
Lot of variables that go into tire wear/life--just keep reading on the various RV forums and make a decision the best fits your needs. NO tire is immune from damage/blowouts--just be sure you have plenty of overcapacity for your trailer weight.