my current trailer came with towmax. Ran them for 30K miles till they were worn out and replaced them with goodyear endurance. Other trailer has Maxxis, but when they are worn out I'll likely go with endurance.
As for cost, the endurance I got when they came out were less than the equivalent sized and LR Maxxis.
Why endurance ST rather than an Lt?
1) in a 15" tire there are virtually (maybe actually) no LT LRD tires let alone LRE. LRC just doesn't cut it, I need at least a LRD. And I wasn't ready to go up to 16"
2) the endurance while an ST carries a 85mph speed rating and load rating markings same as passenger and LT tires do, which I suspect that to carry the speed rating per NHSTA means the tire passes the same test that a LT tire of the same speed rating and LR does. And the endurance speed rating doesn't require a reduction in load capacity like many of the other ST tires have for speeds above 65mph.
So I suspect that the endurance meets the ST tire requirements related to sidewall strength and LT tire ratings for load and speed.
BTW, between myself and 2 neighbors we have logged well over 400K miles towing trailers. One neighbor has close to 250K of those miles. Two of us have TPMS. Between us we have had nada, zip, zero tire failures. With the TPMS I did catch a slow leak from a nail before catastrophy as did the one that has over 250K miles. And all of us have been using ST tires. Maxxis on another trailer I had, and Maxxis the dominate tire on the other trailers till the endurance came out.
2011 Keystone Outback 295RE
2004 14' bikehauler with full living quarters
2015.5 Denali 4x4 CC/SB Duramax/Allison
2004.5 Silverado 4x4 CC/SB Duramax/Allison passed on to our Son!