The 255/85r16s are comprable to a 285/75r16 in size and supposedly that is the limit you'd want to run without lift. Don't know how many of us in the US are interested but if you can obtain a few sets of steel 6.5" factory Toyota rims, I'm definetely game for group order; and we'd praise you
I've never had issues with MT tires in sand, and I've done my share of variou sand conditions...