For anyone that wants to put XPS RIBs on a RV trailer, go to a Michelin Commercial Tire Store. They will willingly sell you their best tire you can put on a 6K axle. You will be hard pressed to find a ST tire in a Commercial Tire store, as they deal mostly with people making money hauling things and can not risk the down time from tire problems.
I ran a set for 6.5 years and 44K miles, and sold them for 200 bucks on CL and installed Bridgestone Duravis R250 the second time around as they were 50 bucks per tire cheaper. I actually like the tread pattern on the R250 better.
