I have a prototype one, LOL. I build it last year. It is a 2018 XF High Country geared 21/41 with the 1-3/4 BackCountry track and Yamaha clutches. Good in anything but not best in all. I personally think it corner as good as my 2014 Viper X-TX. The QS3 are definalety a plus over the air shocks. It is more of a trail sled than off trail in my opinion, at least if you live where there is some snow. I do not live in the mountains but not in the flatlands. I do 90% trail and 10% off trail, but when I go off trail I go OFF TRAIL. So that mean a 137 with wide front wont do the task, but with the 141 with the crossover front end at the narrowest position, I can go where I want. The 1-3/4 lugs wont throw you like a catapult on loose snow, but it grip good in any conditions. The 1.6 Cobra is better on trail but the BackCountry is a good compromise to have the edge off trail or if you drag race. Never had any overheating issue because of the track lug height. If you like to go fast anywhere, trail/off-trail without having to worry, this is for you.