I've had it with cheap Chinese trailer tires!

FWIW - I believe that all of the ST tires are rated at 65MPH
This was another reason I went the LT route
The Carlisles that Discount Tire keeps on hand are rated at 81mph, but the sweet spot for my truck is 63mph, so I would never even come close to that.
They have another Carlisle that's special order rated at 87mph.