29 Inch 21 Speed High Carbon Steel Double Disc Brake Foldable Mountain Bike Product description: Equipped with a quick release clip, the bicycle can be folded quickly, can be easily folded and stored in the corner of the apartment or in the trunk of the car, and can be carried with you. The 21-speed allows you to adapt to the terrain for uphill climbing, downhill riding or pure acceleration, while the front and rear disc brakes provide additional braking power. The padded ATB saddle has been sewn for long-lasting quality. The alloy quick release device can easily adjust the seat height. Oversized 29-inch tires provide extra grip and stability on roads or small roads. Adjustable saddle to meet the needs of people at different altitudes. Equipped with a quick release clip to help quickly.