Q78 is a great size. Very effective in thick mud. You're about right, 35x11.
The problem with the SX's on a light vehicle is that they are a bias-belted tire. That means they have the heavy construction of a bias ply tire (with bias plies, of course) but they also have radial belts to try and achieve some of the on road performance of a radial. This extra construction makes for a heavy duty tire that has to run lower pressures to flex well under a light vehicle like a Toyota or Landy.
They are also a lot heavier weight wise. Size for size they are like 12% heavier than their regular TSL counterparts.
Strong sidewalls though, which can be helpful out in the bush I guess.
The problem with the SX's on a light vehicle is that they are a bias-belted tire. That means they have the heavy construction of a bias ply tire (with bias plies, of course) but they also have radial belts to try and achieve some of the on road performance of a radial. This extra construction makes for a heavy duty tire that has to run lower pressures to flex well under a light vehicle like a Toyota or Landy.
They are also a lot heavier weight wise. Size for size they are like 12% heavier than their regular TSL counterparts.
Strong sidewalls though, which can be helpful out in the bush I guess.