I've only had mine with 27.5x2.5 WTB Breakouts on it (mounted on WTB Asym i29 rims). So not a true B+ tire. I have a set of WTB Trailblazer 2.8 tires I haven't tried yet. Not sure I even want to, they aren't really 2.8, and a smaller tread than the Breakouts. I'd like to see if I could fit a Rekon+ or Ikon+. I have a 2012 frame, and the rear spacing looks damn tight for a true 2.8. May also be pretty tight in my fork (2012 Revelation).Thinking about finding a plus wheelset and tires and trying it on my Yelli. Anyone else tried the same?