For years, the fixie and single-speed bike market was dominated by heavy, unreliable, all-flash bikes which lowered standards and proved sluggish and difficult to ride. The RapidCycle Evolve surpasses expectations of fixed-gear road bike performance, so light you can lift it with two fingers and designed with best-in-class aerodynamics and riding experience in mind. Available in head-turning colors, the Evolve is equipped to grab attention, blaze down city streets and provide unlimited fun. Color options: Army green, black, red, orange, purple Model: A148GR Available sizes: 48 centimeters, 53 centimeters Frame: 7005 Aluminum alloy (Hydroform/Double Butted) Forks: 7005 Aluminum alloy (Hydroform) Saddle: RapidCycle Saddle Wheels: RapidCycle 700 x 40mm Race Wheelset Tires: CST 700 x 23mm Seat post: RapidCycle 30.4 mm / 300 mm Shifters/speed: Fixed Handlebars: RapidCycle alloy Flatbar 480mm Materials: 7005 Aluminum alloy Seat dimensions: 11 inches long x 4.5 inches wide Dimensions: 65.5 inches long x 36 inches high Assembly required. Gender: Unisex.