The Attack FSX (Dak's favourite) compound and tread pattern are almost exactly the same as the E*Thirteen TRS+ Gen.2 Mopo tires I've been running for the last three years. I've been trying many tread patterns and compounds over the years (Magic Marys and DHRII were my previous favorite), and so far, the TRS+ Gen.2 Mopo (40d) are my favorite ever. Awesome grip on wet rocks, hardpack, no squirming of the knobs in turns, great durability, and the Mopo compound has really good damping properties. The sidewalls on the Trail version weep sealant becase of the way the fibers are molded...