Specifications Material: Carbon Steel, Rubber, Sponge, PC, Aluminium, Aluminum Alloy, PU Color: White Style: Modern Special Feature: Portable, Foldable Surface Treatment: Argon Arc Welding, Paint Baking Braking: Caliper Braking(Front), Holding Braking(Rear) Assembly Required: Yes Number of Items: 1 Number of Speeds: 6 Applicable Height: 1.4-1.9m/4.6-6.2ft Maximum Bearing Capacity: 90kg/198lbs Wheel Size: 51cm/20in Seat Adjustment Height: 75-93cm/29.5-36.6in Armrest Adjustment Height: 97-113cm/38-44.4in Armrest Distance: 53cm/20.8in Gross Weight: 15kg/33lbs Net Weight: 12.65kg/27.8lbs Product Size: 146*113cm/57.4*44.4in Foldable Size(L*W*H): 80*58*35cm/31.5*22.8*13.7in Package Size: 87*34*63cm/34.2*13.3*24.8in Package Included 1*Folding Bike 1*English Installation.