Here's the truth,
on "tubless wheels" the the michelin has a higher chance of popping off the bead, I run the Michelin for my local trial becuse they are more redily available. However, at the Scottish six days I run the Dunlop, becuase it has a lesser chance of falling of the bead leaving me stuck out on the Moors.
this is for trials.
For my KTM520 or my Cr450F, I run the "Michilen X11 tube type", It is available through Parts and Western powersports, any dealer can get these, the trials tire works better in most conditions than anything else, I prefer it here in the Northwest us woods, Jawbone, even Baumgardner Idaho. Size?They are only made in one size, and it works great. The trials tire on enduro bikes has been one of my best kept secrets.
The Irc has a weaker side wall and feels "squirly" in the rear.
DS