Biria Step Through 3-speed Shimano Nexus internal Hub, Aluminum, Black 18 Inch frame size, Cruiser comfort German design Bicycle Frame: Aluminum,Fork: Hi-Ten unicrown Gears: 3-speed Shimano Nexus internal Rims: Aluminum, Tires: 26x1.75, Stem: Adjustable Aluminum, Stem: Adjustable Aluminum Color: Black, Weight: 31 lbs, Designed in Germany