I Ride a 29 Full Suspension and my Friend Rides a 29 Hard Tail, and they both do Great, I am going to get a 27.5 (650B) though, they are bit more Agile to me, I have a 26 also they 27.5 is good Mid choice, but make sure to get fitted for your bike choice, the Right size frame and set up will make huge difference. the hardtail is Lighter also to point out.