TFCFL 21-Speed Bike Folding Mountain Bike with Variable Speed Positioning Chain Large Footrest Folding Clip

21-Speed Bike: Its main wheel has 3 discs and the driven wheel has 7 discs, you can choose to hang on different discs of the main and driven wheels to get 21 different speeds to facilitate your ride Precision Shifting: It has a precision shifting front and rear chainstay that gives you precise shifting for different terrain. The precision 21-speed mountain bike gives you a smooth shifting experience Adjustable Saddle Height: Its saddle can be adjusted between 80-95cm/ 31.5-37.4in, so you can adjust the height according to your comfort Material: It is made of thickened high carbon steel material, which has strong corrosion resistance and load-bearing capacity, making it very stable to ride and not easy to damage at the same time Large Footrest|Folding Clip|Lockable Fork|Variable Speed Positioning Chain