Serotta Colorado III road bike. Seat tube center-center is 55cm, top tube is 55cm c-c as well. Should fit most in the 5'8" to 5'11" height range or so.
Steel frame with Serotta C4S proprietary tubing, Serotta O2 carbon fork. Shimano 18-speed 105 group (front and rear derailleurs, shifters, brake calipers, cassette), Ritchey headset, Bontrager stem and drop bars, Mavic 32h rims on Shimano 105 hubs. New sub-compact FSA crankset with 46/30 rings for hill-climbing, original Shimano 105 53/39 crankset and bottom bracket can be restored. Will come with a Fizik saddle and Look clipless pedals (not shown). New Planet Bike Tachyon grippy reflective bar tape.
Bike is in excellent mechanical condition. Some surface paint scuffs on chainstay and other small signs of use, nothing that affects function or integrity. Tuned and road ready.