How to Use a Bicycle Derailleur

How to use a bicycle derailleur
The biggest feature of shifting bicycles is that they can adjust the front and rear gears to use different speeds and different forces.
The rear wheels mainly control the speed. The smaller the gears used, the faster the speed. Several gears represent several gears.
The gear adjustment of the rear wheel is generally on the right handle of the bicycle, as shown in the figure, there are 7 gears, which correspond to different gears. You can adjust the gears by yourself as long as you swing back and forth. The front wheel mainly controls the power. The greater the force used, the more gears represent several gears.
The gear adjustment of the rear wheel is generally done on the handle of the bicycle. As shown in the figure, there are three gears, front, middle and rear, which correspond to different gears. You can adjust the gears by yourself as long as you swing back and forth. The correct posture of riding a variable-speed bicycle/mountain bike, There are generally two points to keep in mind:
1. The height of the seat cushion, the whole leg is just straight when the heel steps on the pedal to the bottom
2. Adjust the angle of the seat cushion and the handle so that the back is bowed when riding, not straight.
The principle of speed regulation:
The smaller the rear wheel used, the faster the speed, the larger the front wheel, the more laborious it is, and it can be adjusted according to your physical strength and road conditions. For example, on flat ground, you can use the small rear wheel and the big front wheel, and when going uphill, you can use the small front wheel and the big rear wheel.