This bike is a Trek 7100 hybrid and it is 2 years old. I am a 5 ft 7 in male and it fits me perfectly. The bike is a men's and it is 17.5 inches. It is in great condition and I love this bike. The only reason I am selling it is because I started competing in triathlons and I needed a more competitive bike. For riding around town this bike is incredibly comfortable. I bought it brand new for $400 but I need to sell it to cover part of the cost of my new bike.