Just picked up a new Jet 9 carbon frame, so this one has to go. I'm selling my lightly-used 2015 Niner Air 9 29er alloy frame. I built this up in the spring and rode it as my second bike all summer and fall, so it has less than 500 miles on it. The frame is in excellent condition with a few light nicks and scratches, but no dents or deep gouges. According to Niner's website, size Medium fits anyone between 5'9" and 6'0".

http://www.ninerbikes.com/air9

This is the updated frame configuration with the 12x142mm rear thru axle (not included), which is significantly stiffer than the previous versions with the 10x135mm quick release. $400, picked up around Boulder. Will ship at buyer's expense. PM if interested.