This is one of the best all around XC tires out there. I ran mine tubeless at 25 psi for training and as low as 21 for races. The ProTection technology makes for a super solid tubeless set up, and these tires have excellent flat protection especially when compared to some ultra-thin XC tires. It's a fast-rolling tread that also holds amazing grip on rocks and in corners. I have yet to run them in really wet or muddy conditions. An ideal XC quiver for one season would be 2-3 sets of these and a pair of X-Kings for the mud.