HALJEN 24-inch Mountain Bike, 21-speed Dual Disc Brakes, Men's and Women's Mountain, City Bike, Magnesium Alloy Frame，Grey

[High tech Frame] HALJEN bike has a magnesium alloy frame for riding and moving with ease,corrosion resistant and very easy to clean and maintain. [Brake&Shifter] Dual Powerful disc brakes are more efficient than other brakes, provide you better durability and stopping power for your rugged and damp adventures . 21 Speeds drive train allows you to find the place that’s most efficient and the higher gear to pursue speed within a wide range of variability. [Good Tires] Double wall aluminum rim is stronger,protects the inner tube to increase the strength of outdoor riding. HALJEN tire is not only thin and roll fast，but also is non-slip and wear-resistant. It has outstanding grip and puncture resistance ,suitable for hillsides, gravel, city streets and trails. [Equipped with double disc brakes] Double disc brakes with good performance, bad weather and environment have little effect on braking performance, good braking effect and short braking distance. [Complete accessories, easy to install] 85% of the bike has been assembled when it arrives. You need to install the front wheels, pedals, handlebars, seats and inflate the tires to ensure that they are fully installed and Secure before riding safely. The installation instructions are enclosed in the package, please read carefully before installing the and adjusting the brake and speed system.All tools are included in the package, no additional tools.