Specs Frame Hi-Ten Steel with Cro-Mo Seat Tube Fork Steel Unicrown Rims Weinmann Double wall aluminum, black with CNC wall Tires 700 x 32C Gear Shimano Altus 8-speed Stem Aluminum Handlebar Aluminum Brake Front and rear aluminum Tektro V-brakes Standard Front and rear racks, fenders, kickstand Sizes and colors 55 cm (21″): Black, Grey, Celeste Green, Midnight Blue 46 cm (18″): Black, Grey, Olive Green, Celeste Green, Midnight Blue Weight 33 lbs. Package Dimensions 45 lbs, 54 x 8 x 28 inches