Critical Cycles' fixed-gear bicycles are hand built for the commuter lifestyle with a tig-welded steel frame that comes with horizontal dropouts and a component set that is ideal for riding around town, on the beach boardwalk, and for performing freestyle tricks. The fixie includes a flip-flop hub so that you can ride it as fixed-gear or easily switch cogs and cruise on your freewheel like a standard single-speed. Also, you shouldn't have worry about potholes and rough asphalt with your Wanda tires that have been optimized for city riding. The bottom bracket comes sealed on every bike, so moisture or dirt will never cause problems. We've carefully selected Protek cranks, Sunrun freewheel, KMC chain, Well-Go pedals, and Promax brakes, to make sure that your bike will be dependable day-in-day-out and for many years to come. Included with your bike is three sizes of Allen wrench and a Cone wrench so that you can have all the tools you need build your own bike. Available in frame sizes 49cm, 53cm, 57cm, and more than 10 colors to choose from, Critical Cycles offers the best selection of urban lifestyle bicycles anywhere.