It's a medium frame, 29er. I'm 5'11 and it was comfortable for me. Its carbon colored with a light green strip. Dual disk brakes work properly and as do the gears. Brake lines are hydraulic and are hidden inside the frame. It has a remote lock suspension switch near the left side of the handle bars when you want to deactivate the air suspension fork while in mid ride. It's quite light with it's high quality aluminum frame. I've owned this bike for about 5 months and frankly I didn't put as many miles on it as I'd liked to due to work. I also still have the owners manual with CD ROM included. I am letting it go because although an awesome bike, I'm saving up for a full suspension passed the 2 grand range. So with that said.. please have a reasonable offer and I will respond accordingly. Serial number is registered to my name as a first owner. Thank you. Specs availalble on Google for this 2018 Rockhopper Expert model since I can't post url's