I'm looking at a MT32 Pirelli Intermediate terrain rear tire for my KX100. Does anyone have any experience with these? Also, these tires are DOT approved, but after looking at them, they seem to be full-on knobbies. Does anyone know what exactly makes a "full-on knobby" DOT legal? Will they not work as well off-road because of that reason? Help would be greatly appreciated with any of the above questions.