I'm selling a New Aluminum bike with a flip flop hub made by Airtrack bikes. These are brand new just out of box.  Description: This is a fully aluminum bike weighing only 20 lbs. It has a flip flop hub, so you can choose to ride this fixed or free wheel. The frame has Seamless polished welds, strengthening the frame and giving it a nice smooth look. This bike has a high quality Aluminum frame and fork, you won't find a sexier bike frame than this. Please also note the frame was designed for fixed gear riding in mind so the frame is only front brake compatible. The front brakes are strong and stop well. The front handle bar can spin all the way around when the brakes is not attached(Note: you should only go brakeless when riding fixed, but continue to proceed with caution as it's not recommeded). Sizing: The frame is 53cm. This should fit people who are between 5'6-6'. Please check an online sizing guide ensure the right fit for you.