Folding Mountain Bike, 26" 21-Sizepeed Height Adjustable Sizeteel Frame Sizehifter City Bicycle for Men & Women Double Disc Brake Black

Overall Material: High-carbon Steel, Synthetic Leather, Metal, Sponge, Rubber Frame Type: Rigid Frame Front Fork Type: Oil Spring Fork Brake System: Double Disc Brakes Assembly Required: Yes Adjustable Seat Height: 80-95mm/3.1-3.7inch Chain Length: 108 Knots Gear Size: 24/34/42t Three-part Distance from the Handlebar to the Seat: 56cm/22inch Folded Size: 98*33*90cm/38.6*13*35.4inch age_group: adult Please strictly follow the installation diagram for installation and use, and pay attention to the safety precautions inside. Please note that the front fork cannot be locked tightly.