Folding bicycle, English: folding bicycle, belongs to a classification of bicycles. Generally, a folding car is composed of a frame folding joint and a riser folding joint. By folding the frame, the front and rear wheels are folded together to reduce the length by about 45%.
After being folded, the whole vehicle can be put into the folding bag and the trunk of the car. In the process of folding, there is no need to use external tools, and the car can be folded and unfolded manually. After folding, the seatpost is used as a support point to make it stand firmly after folding. The folding bicycle is convenient and comfortable to carry, use, and the production technology is mature.
Main part: including frame, front fork, handlebar, saddle and front fork assembly, etc.
Transmission part: including pedals, cranks, sprockets, chains, bottom axles and flywheels, etc. The pedals are stepped on by humans, and the wheels are driven to rotate through the above transmission parts to drive the car forward.
That is, front and rear wheels, including front and rear axle components, spokes, rims (rims), tires, etc.
Including brakes (brakes), lights, bells, light reflection devices, etc.
According to needs, some accessories can be added, such as brackets, hangers, safety forks, mudguards, air cylinders, etc. In addition, sports cars, racing cars, mountain bikes, etc. equipped with a transmission mechanism are also equipped with a transmission controller and front and rear derailleurs.
Rim size points:
The mainstream products of folding bicycles are mainly 16-inch and 20-inch (there are other 12-inch, 14-inch, 18-inch), of course, if you have special needs, there are also 26-inch products. Generally speaking, products with a size of 16 inches and below are smaller after being folded, which is convenient for storage and transportation, and is more suitable for short-distance riding. If you often want to ride long distances, you must consider a 20-inch product, which not only has higher riding comfort than a 16-inch frame, but also a faster speed. Of course, it is best to choose products with transmission for long-distance riding. Generally, the folding effect of a 14-inch folding bike is between 77cm and 88cm, and it is convenient for people to carry it in urban rail transit. Although the bicycle rim is small, its speed is no less than a 26-inch model, and it is an important means of transportation for people to take a rest in the city.
There are mainly aluminum and steel, a very few use magnesium alloys, and a very few high-end products use carbon fiber materials. If you often need to carry the car up and down, it is recommended that you choose aluminum frame products, most of which are about 10 kg, and 20-inch cars generally do not exceed 12.5 kg. Not only is the weight lighter, but the life of the aluminum frame products is also longer, so there is no need to worry about rust. Of course, weight cannot only be used as a single judgment index. The strength of the frame cannot be ignored. In order to reduce the weight of the car, some manufacturers achieve this by reducing the thickness of the frame material, which is difficult to ensure that the frame has sufficient strength. It is best to ride on it when choosing a car. Not only can you feel the strength of the frame, but also test whether the ergonomic design of the whole car is reasonable. A good design can ensure that the riding posture is stretched and will not be fatigued even for long distances.
On the other hand, some high-end brands of folding bicycles have an advantage, that is, they can be folded into a compact size within 10 to 20 seconds. This advantage is particularly prominent in the British brand Brompton. The unique folding design can ensure that the lights, cables, etc. are not damaged, and after being folded, they can be placed in a matching folding bag, without worrying that the chains and gears will stain clothes and duffel bags.