24″ Mountain Bike, Aluminum Mountain Bike for Adult with Disc Brakes, Shimano 21 Speeds Bike for 14-18 Yeas Old ,Green

Features：

【Aluminum Frame】
The mountain bike equiped with Aluminum Frame. Lighter but stronger frame.
【21 Speed Shimano Drivetrain】
Shimano TZ500 drivetrain allows buyer to switch gears with smoothness. The positioning is accurate, and silky gear shifts without stalling.
【GREAT TIRE PERFORMANCE】
Ultra durable, the mountain bike tire made of high-quality rubber material and has strong puncture resistance and abrasion resistance, bicycle tire is suitable for riding in the mountain, jungle or on the city street.
【POWERFUL DUAL DISC BRAKE】
Our mountain bikes have precision mechanical disc brakes for more precise and controlled braking. Mechanical disc brakes are more effective than V brakes.
【QUICK INSTALLATION IN 20 MINUTES】
The bike arrives 85% assembled and includes free pedals and assembly tools. It is easy enough to put together in 20 minutes. The bike can be fully assembled with ease with the help of tutorial videos, and we are more than happy to help with any problems you may have during the assembly process

Specifications:
Bike Name：Thunder
Chain：1/ 2″*3 / 32″* 104L
Weight：About 29 lbs
Brake：Front and Rear Mechanical Disc Brakes
Frame Size：5 inch
Saddle：Foam Saddle Can Adjust Height and Inclination
Frame Material：Aviation Aluminum Frame , Lightweight , Corrosion Resistant
Tire：24*2.1 inch .
Fork：MTB Front Suspension Fork
Rim：24 * 1.75 AV Aluminum
Shift Lever：SHIMANO RS35

About install:
1. 86% of the bicycle has been assembled. You need to install pedals,front wheels,handlebars and inflate the tires.
2. Rotate the front fork 180 degrees before assembling the front wheel(the brake will be in front of the bicycle)
3. The left and right pedal threads are different. The spindle ofeach pedal is marked with an L/R mark to ensure that they are assembled in the correct position. The right side pedal has right-hand threads. The left pedal has left-hand threads. Use a tool to screw the two pedals into the crank arm as much as possible.
4. All tools are included in the packageno additional tools For detailed assembly information,please watch our assembly video.