I started into riding on a 26" even though everyone at my local shop said to get a 29". i just did not feel comfortable on the 29 and if you don't feel it, it's not going to work. so, i went 26 and really loved it, i have no complaints about the 26 size. Having said all that, with the explosion of 27.5 bikes this year I started doing my research. I finally decided on the Yeti SB 75. I am loving it. My speed and abilities are going up every time I ride. The only issue has been that the 1x11 (XO1) 34T chain ring rubs the frame (chainstay). It clears by a fraction just sitting, but in rough conditions the ring barely rubs (paint off) the frame. Conversations with YETI they have said that yes they know this and a 34T is the max that you can run on a SB 75, but a 32T would be better for the clearance. I have switched to 32T ring and the clearance is fine with it. Now it just if I can be Ok with the ratios that the 32T ring brings. I really believe that this issue is more about the crank design than the frame design, but that is my opinion. I love the frame in every other way.