Middle school students and girls can ride ordinary cars, not too big, and boys can ride mountain bikes, which is more labor-saving.
Generally, you can choose domestic Phoenix, Giant and Perpetual bikes, and those with well-off families can buy imported brands such as Nicolai Nicola, Marmot Groundhog, Colnago Plum Blossom, Tyrell Taylor, Look Locke and so on.
Bicycle type:
1. Ordinary bicycles
generally refer to Kun vehicles, and the riding posture is standing with bent legs, which has the advantage of high comfort and is not easy to get tired after riding for a long time. The disadvantage is that the leg bending posture is not easy to accelerate, and it is difficult to achieve high speed because ordinary bicycle parts mostly use very ordinary parts.
2. Road bicycles
The types of vehicles used on smooth road surfaces, due to the low resistance of smooth road surfaces, are more concerned with high speed in the design of road bicycles. They often use downward-bent handlebars that can reduce wind resistance, narrow high-pressure low-resistance tires, higher gears, and larger wheel diameters than ordinary mountain-climbing off-road vehicles. Because the frame and accessories do not need to be strengthened like mountain bikes, they are often lighter in weight and more efficient when riding on roads. Because the frame does not need to be strengthened and often adopts a simple and efficient diamond design, the road bike is the most beautiful bicycle.
3. Fitness Bicycle
The most important feature of a fitness bicycle designed with a new concept of health, fashion and new concept is the dual power of hands and feet, and the speed can reach 4 km/h; There are many ways to do work and good fitness effect. When riding this bicycle, the hands and feet can do work on the bicycle drive at the same time, or they can do work with the hands or feet alone. Adopting the straight-line method of pulling the foot pedal and the swinging method of pulling the swing lever by hand not only improves the running speed of the bicycle, but also exercises the leg muscles and arm muscles. Obtained a number of national patents, which is suitable for middle-aged and elderly people to use as a means of transportation for walking and fitness, and also suitable for young people to use for tourism and entertainment.
4. Track Cycling
A bicycle used on an extremely smooth oval track indoors. This bicycle has no brakes (for braking), no gearbox and no reversible flywheel.
5. Mountain biking
Mountain biking originated in San Francisco, USA in 1977. Vehicles designed to ride in mountainous areas usually have gearboxes that can change labor-saving or fast gears. Some will install shock absorbers on the frame, and some tire treads are chocolate tread patterns to facilitate riding on unpaved roads. The dimensions of mountain bike parts are generally in English units. The rim is 24/26/29 inches, and the tire size is generally 1.-2.5 inches. The frame size is also expressed in English units, such as 14 ",17" and 19 ". It is divided into many categories in detail, and the xc category is commonly seen. Variable speed, good tire grip, suitable for off-road, and shock absorption system to reduce bumps. The overall strength is large and the impact resistance is strong. Compared with ordinary bicycles, it is not easy to be damaged when riding strongly.
6. downhill cycling
appreciation of bicycle pictures (3) downhill cycling, also known as downhill cycling. English abbreviation DH. It is a very challenging activity. Riders use special DH bicycles to glide on the hillside and even fall down the mountain to seek excitement. Activities are mostly carried out in ridges, mines and snow. The Austrian used DH to create a world record of 21.4 km/h. The frame angle of downhill bike is different from that of mountain bike, and the parts are in English units like mountain bike. Wear helmets, armor and other equipment when carrying out this activity. The shock absorption stroke of the front fork is longer than that of mountain bike and XC bike. Tire width is generally more than 2 inches.
7. Children's bicycles
Children's bicycles are also called children's bicycles and children's bicycles. Chinese mainland, Taiwan Province and Singapore usually call them "children's bicycles" or "children's bicycles"; In Hong Kong and Macao, it is usually called "children's bicycle". Children's bicycles are a big category of baby carriages, which include children's bicycles, children's carts, baby walker, children's tricycles and so on.
8. Driving a bicycle
Bicycles that simplify the traditional pedals and seats are smaller and more portable, such as Loker and Lbike. Their * * * features are that the rider stands in a standing posture, drives the pedal to reciprocate with both feet, and transmits the driving force to the driving wheels through the transmission mechanism. The difference between Lbike and Loker is that the rotating shaft of the pedal is in the middle of the sole, and the sole and heel of both feet.
9. Dead cycling
Dead cycling originated from track cycling. The flywheel is fixed. If you step forward and step backward, the car will go backwards. Later, some other cyclists use abandoned track cycling as a means of work transportation, which can travel quickly in the city at a low price, and requires certain riding skills, which ordinary thieves cannot steal. These characteristics make it popular among cyclists in Britain, America and other countries, and become a street culture.
Major bicycle brands have also followed suit, developing and popularizing dead-car models, making them popular among the public and becoming the most popular bicycle styles in the city. Pure dead flying car needs certain technology and is dangerous, so the products developed by these manufacturers are both dead flying and live flying, and are equipped with brakes to ensure safety.
1. Folding bicycle
is a kind of vehicle designed to be easy to carry and put into the car. In some places, railway, aviation and other public transport vehicles allow passengers to carry folding, folding and bagging bicycles with them.