You may already know but a ST tire has a 65 mph max speed rating. The P or LT are 75 mph + rated if you travel that fast.
The Kumho 857 in a 205R14C has 2071 lb load rating at 65 psi. These have become very popular with the RV crowd for replacing 13" and 14" ST tires.
Lots of trailering folks (all types including RVs) are using the commercial grade Maxxis U-168 in many sizes including several 14" sizes. I see the U-168 comes in a LT205/75-14 load range D at 2241 lb capacity. Lots of Maxxis stores around here but not in all parts of the country.