I run Toyo MTs in 17 x 13.5 x 37, Load range E, 10 ply, 4,350 lbs weight capacity per tire, on a lifted diesel Ford Excursion. 13.5" width corresponds to ~ 345 metric. Aired down to ~ 20 psi, they are probably closer to 400 metric wide, and I was able to climb the sand dune adjacent to Chocolate...