Aluminum frame. Shimano Exage crank set. Malliard low flange hubs laced to Matrix alloy rims with stainless steel spokes. Tektro dual pivot side pull brakes. Shimano Tri Color rear derailleur with Shimano bar end sifters with indexed shifting. This bicycle has been through our complete mechanical restoration process; all bearings including headset, hubs, and bottom bracket have been overhauled, all components removed cleaned, inspected and adjusted for peak performance. New tires, tubes, rim strips, chain, freewheel, rear derailleur, bar tape, stainless steel cables, and housings. The best warranty in the bike business, one year on parts and lifetime free tune-ups and labor.