What are the advantages of bicycle axle braking and wheel braking?

Axle brakes include disc brakes, drum brakes, drum brakes and common brakes. That is, the braking force acts on the axle to stop the axle, thus stopping the car. Disc brake: a relatively new braking method, which was often used on motorcycles in the early days. It has the characteristics of light weight, good braking effect and mud prevention. Because of its high price, it is a popular accessory for many mountain bike enthusiasts. Disadvantages: Due to the cost and fragility of intervertebral discs, the failure rate is high. This kind of brake is common in mountain bikes, recreational vehicles and other vehicles that do not need too much body weight. Roller brake: a popular bicycle braking method in Japan. Due to the similar bearing design made of all-steel material, the braking effect and service life are excellent. It can be said that it is an accessory once and for all. However, due to the patent (invented by Shimano Company in Japan), the accessories are not universal and cannot be matched with the hub and brake parts at will. Advantages: long service life (not a problem for ten years), safety and reliability, and low noise. Disadvantages: it is the heaviest of all brake accessories and has poor versatility. This kind of brake is common in the drum brake of recreational vehicles (daily travel and walking to work): in the early all-steel brake, the brake part was integrated with the flower drum or could not be completely separated. At present, it has been eliminated, and it is common in old-fashioned flying pigeons, permanent, phoenix and other cars. Japanese reversing brakes (braking when pedaling backwards) also belong to this category. Some electric cars and motorcycles are still in use. Brake with high noise during braking: a braking device that uses the huge friction generated by rubber or steel spring leaves and the friction device installed on the flower drum to brake. Because of its simple structure, low cost and good reliability, it is often used in daily leisure scooters. Disadvantages: heavy weight, fear of water, loud noise when braking, short service life. Wheel brakes include: V brakes, caliper brakes, suspension brakes, etc. That is, the braking force acts on the wheel rim, making the axle stop rotating, thus stopping the car. V-type brake: V-type brake is a very common braking device on bicycles. The two brake shoes clamp each other to generate friction, thus achieving the braking effect. Because its shape resembles the word "V", it is called V brake. V-type brakes are widely used in various bicycles and electric vehicles. Advantages: light weight, simple structure, convenient installation and maintenance, low cost and high cost performance. Disadvantages: rainy, muddy or wading roads are easy to slip. Clamp brake: The brakes of road vehicles are mostly clamp brakes. The caliper brake is a position to fix the brake frame on the front fork of the road vehicle. In fact, its working principle is similar to that of V brake. Advantages: light weight, simple structure, convenient installation and maintenance, low cost and high cost performance. Disadvantages: rainy, muddy or wading roads are easy to slip. The braking effect is limited by the tire diameter, and caliper brakes are generally used for cars with smaller tire diameters. Suspension brake: The principle is the same as that of V-brake, which can also be said to be a simplified version of V-brake. However, due to poor reliability, it has been basically eliminated. It is common on cheap bicycles, but it also appears on professional racing road vehicles because of its light weight.