<human>:  What should I look for in a quality mountain bike?
<bot>: When looking for a quality mountain bike, you should look for features such as a lightweight frame, strong wheels and tires, reliable brakes, a comfortable saddle, adjustable suspension, and high-performance gear shifters. You should also consider the terrain you plan to ride on and the type of riding you will do, as different bikes are designed for different activities. Make sure to research the different components and decide which ones best suit your needs and abilities.