My group and I ride Idaho single track. We constantly debate the trials tires.
Here is the consensus from 10 guys some haters and some lovers. We'll say Michelin
trials vs. IRC
M5B and other soft terrain to intermediate tires.
-Trials are not as good in mud.
-Not as good in snow.
-Not good for brake sliding around corners. The bike tends to stand up instead of the lean/slide.
-Fast guys don't like them.
-Seem to do surprisingly well in the sand... This doesn't seem right looking at the tread but they do just fine...
-Eerie on pavement, sidewalls wallow like crazy.
-INCREDIBLE on dry dirt, moist dirt, rocks big and small...So easy to wheelie over when you are expecting spin. Makes it hard to clutch and spin up the tire, seriously crazy grip. These things will make you look like an Erzberg champion
when the going gets tough. They are like cheating.
-They are easier to pinch flat (with equal psi) AND easier to put new tubes in. No spoons required on a well worn trials. We run them between 8-16 psi depending on conditions. Trials guys run them even lower....
-Many claim that the grip is best between 400 and 1200 miles, they need to break in. Even after the knobs start to come off they still do really well.
-Yes 1200 miles. One of the guys we ride with logs every ride and has got the most durability out of the Michelin.
Usually 1200 miles.
-They cost twice as much but last up to 3 times as long.
Personally. I don't like them. Mostly the way they corner and the way they look. But the traction is undeniable. You have to try one. We usually get the tubeless because the sidewall is stiffer. We still but tubes in them of course, usually the heavy duty.
There is my/our two cents.