yes they wont last long on hard pack clay once it dries out, especially the rear, you can actually rip off the center knobs. The M12 does well when it dries up if you mainly ride offroad. I love Michelin tires. I also like Pirellis. Im not sure if DOT matters down under but a lot of the Pirelli knobbies are DOT tires. I have a XCMS that is DOT stamped and its even more aggressive than a s12. I am pretty sure the XCMH are DOT as well.