This is a 2017 Cervelo S3. Lightly used. Probably no more than 500 miles. Carbon frame, carbon wheels, tubeless tires, electronic shifters, disc brakes, carbon handle bars, SRAM Red eTap controls. This is an Aero bike and weighs only 20 lbs. Frame is 48 cm which is for smaller people (I am 5'2" woman). Seat is Cobb Max, again a woman's seat. If you want something that is light and fast and shifts like a dream, this is it. Will provide shipping within continental US.