The transmission accessories are different: the transmission bicycle has transmission accessories, the middle flywheel and the rear flywheel have multiple gears, the single-speed bicycle has no transmission accessories, and the middle flywheel and the rear flywheel have only one gear.
Choose different gears: Variable-speed bicycles can choose different gears according to road types and slopes to adjust their riding speed, while single-speed bicycles cannot choose gears according to road types and slopes to adjust their riding speed.
Different physical energy consumption: speed-changing accessories can make cycling easier and effectively reduce physical energy consumption. Single speed makes cycling more laborious and requires more physical strength.
Different structures: Single-speed bicycle has a simple structure, and can be directly pedaled by installing gears on the axle and connecting pedals through a chain. The transmission is more complicated than ordinary gears, and has a plurality of gears with different radii, which can adapt to various road conditions and is suitable for long-distance and outdoor riding, but it is prone to failure due to its complex structure.
The so-called single speed is the speed of cycling. The bicycle itself will not change. The diameter of the wheel and the diameter of the flywheel behind the car are fixed, so it is called single speed. Variable-speed bicycle is a kind of racing car with narrow wheels. The purpose is to reduce the weight of the car body to the maximum extent, so that it can ride at a light and high speed. The function of bicycle transmission system is to change the speed of the car by changing the cooperation between the chain and different front and rear gear plates.
In other words, variable-speed bicycles are more time-saving and faster than single-speed bicycles.