Most here are saying stay away from the ST tires. Why? Also folks are saying the Sailun S637 is a good tire but both the 235/80R16 G load index 129/125L 14 ply max 4,080# @110psi *AND* the 235/85R16 G load index 132/127L 14 ply max 4,400# @110psi are ST tires.
http://www.sailuntires.ca/MRT/S637.html
I'm considering looking at the Sailun S637 235/75R17.5 load index 143/141L 16 ply max 6,005# @125psi. With new rims total $$ will be ~$2,000.