As, I said before, I ride a lot of mountain trails in Colorado, and for the most part never have many issues with width, as Colorado is Loaded with 4X4 trails, and fire roads. I'm not saying that there are no ATV/ motorcycle, or motorcycle/horse only trails, but there are so many of the 4X4 trails that one can ride the S,or XP on, that the ATV/motorcycle only, or motorcycle/horse only trails are just not that big of a deal. Last year at the 2nd annual RZR Forum Ride there were a lot of S's, and some XP's. I was one that had a S there, I came early, and stayed for two weeks, rode almost a total of 600 miles, rode the majority of the trails, and don't remember once having any issues with width. With all the ADVANTAGES of the XP, I would not want to go back to the S, and for sure not the 50. I bought my 2012 XP just a little over 3 months ago, and now have over 1600 miles on it. And as much as I liked my S,(which at the time, thought it to be the greatest). I'm not regretting the trade up to the XP. It's just a hoot to ride, especially on all the twisty, turny mountain trails. See ya at Taylor...