UPC 712392689144

• Stiff, lightweight, and responsive frameset made of double-butted 6061 aluminum ideal for road, street, and track racing
• Aerodynamically improved fork built for speed - ready for anything from a criterium to a commute
• Hydroformed top tube and seat tube; smooth welds and hand polished finish
• Includes integrated headset, 31.8mm seatpost clamp, and 68mm English threaded bottom bracket
• Available in 49cm, 52cm, 55cm, 58cm, and 61cm sizes; framesets weigh 4 pounds, 8 ounces to 5 pounds 4 ounces

Designed to perform on the streets, the velodrome, and everywhere in between, the affordable Pure Fix Keirin double-butted 6061 aluminum frameset is ready to take you to the next level of riding. Pure Cycles offers two options -- the Keirin and Keirin Pro -- that are ideal for riders who got hooked on fixed bicycling with their first Pure Fix Fixie. The Keirin frameset with double-butted 6061 aluminum tubing is designed to give you the edge on the track and the streets. Featuring an integrated headset and smooth welds, it's light, stiff, responsive, and ready for anything from a criterium to a commute. This frame also has an aerodynamically improved fork, hydroformed top tube and seat tube, 31.8mm seatpost clamp, and 68mm English threaded bottom bracket. Both the Keirin and Keirin Pro are available in five sizes with a weight range of 4 pounds, 8 ounces to 5 pounds 4 ounces: Aluminum bike frames can have double-butted and triple-butted tubes that have different thicknesses, allowing the frame to handle high-stress points at the end of the tubes without having additional weight through the middle. Double-butted frames add extra material at each end of the tube where additional strength is required. Triple-butted frames use the same process, but reduces weight in the center even more. Celebrating bicycling for all that it offers, Pure Cycles offers a variety of frame, geometry, and gearing options as well as a cornucopia of compatible accessories, including different styles of handlebars, saddles, water bottle cages, foot straps, and more.