The Good: Awesome Grip in hard, loose, loose over hard, loamy and sand (2.4 size). Good over dry roots and rocks. Aesthetically a good looking tire. Not tried tire in mud or wet conditions. Compares to the Nevegal in terms of all purpose traction. Tire rolls very good. Medium lugs spaced apart. Good float. Large carcass and plenty of meat.
The Bad: The sport tire is very touchy to air pressure. With to much air pressure tire is unforgivably hard and stiff. Not enough air pressure and the tire flexes a lot. Does not have transition knobs. Cannot be setup as tubeless easily.
The MKII sport tire has thin sidewalls and will be difficult to setup tubeless personally I would not even try just buy the UST tire. Using a tube helps support the sport tire although does add to the already heavy weight of 740-780 grams. I have found that for my weight and riding style and area 45-46 lbs in the rear and 40-42 lbs in the front is the sweet spot for me. I weigh 220 lbs. The MFG recommended pressure is50 - 65 which when inflated to that size I found the tires to be nearly un-rideable at that pressure they lose traction and, are extremely stiff however, if you ride on the street a lot that might work for you. Although they ride pretty good for me on the street on the way to the trails at my pressure. Also, if you are used to tires with transition knobs these tires will take some getting used to. Once I got used to thesetransition-lesstires and trusted them I have yet to go into an uncontrolled slide or have them break loose on me. I'm sure this has to do with getting the pressure dialed in for your weight. They are easy to get on and off the rims by hand. I have found that the 2.4 tires have added something I did not expect. Less jarring on myhard-tail and great float.