56cm (size M) Crust Lightning Bolt + Chris King 1" threadless headset. Lightly used. Bottom bracket is not included.This Single Speed Bolt utilizes Ritchey's Break-Away system. It has a split at the seat stay/ seat tube junction and a coupler in the down tube near the seat tube. It requires you to loosen three bolts in total and pull your seat post. This allows you to easily break down the bike for travel or any other reason you'd want to make the bike very compact. The wall thickness of all of the tubing has been bumped up slightly to prevent denting while packed away in transit.This bike is ideal for those of you who do a lot of traveling, flying or not. It also makes for a super fun Randonneur style bike, commuter, or all-around-do-whatever bike.