Pay attention to achieve the purpose of fitness or exercise, don't ride a bike, then there will be no ergonomic geometric design, and it will only get more and more tired. It is also not suitable to take a straight grocery car and an ordinary Kun car.
? Cycling is mainly divided into three categories: road bike, city bike and mountain bike (compared with cars, road bike is like a coupe, city bike is like a standard car, and mountain bike is like a cross-country jeep). Their corresponding roads and riding purposes and ways are also different.
The geometric parameters design and configuration of road vehicles are most conducive to human body's exertion and pedaling, and the rolling resistance and wind resistance are very small. Among all bicycles, the road bike is the lightest and fastest (pneumatic breaking wind racing road bike, such as Propelav of Giant, it is easier for cyclists to ride to 45km/h), but the riding posture is radical and low, which requires the adaptability of lumbar muscles and cervical vertebrae, and the handling stability and braking at high speed require considerable experience, not all. The price is higher. Take the giant as an example, the entry level is more than 2000 yuan.
? Mountain bikes are the most common in the street, originally designed for cross-country play, competitions and rugged terrain in Shan Ye (but the domestic consumption level is generally low, so many so-called "mountain bikes" with a price of only several hundred or several hundred yuan are very popular). Compared with road bikes, mountain bikes have the disadvantages of heavy frame and wheels, shock-proof design, shock-proof front fork (soft-tailed mountain bikes have more rear shock-proof suspension and rear shock absorber), and the tree root array, stone array, gravel mixed road and soft and muddy weeds in Shan Ye forest road are similar to mountain bikes (just like cross-country jeeps). But the weight is heavy, and stepping on it releases strength (for example, riding a road bike feels like running on a hard road, and the feet are tough and resilient; Riding a mountain bike feels like running on sand, but because of the priority of control, the riding posture is friendly and most people can adapt. The price is low, such as the giant entry-level mountain bike ATX660 more than 1000.
? Urban bicycle is a combination of the two, the main body is the structure and design of road bike, which is lighter, faster and more labor-saving than mountain bike, but the front control part is mountain bike, so the control stability is better than road bike. At present, bicycles are the second most common bicycles in Europe and America (the first is road bikes, the third is grocery cars, and mountain bikes are rare. Because there are many mountain bike parks and Shan Ye forest roads, people ride mountain bikes in a 4+2 way. ? The price of city cars is in the middle. For example, Giant's entry-level escape 2(SL2) 1000 yuan (the price is equivalent to its mountain bike ATX 660), but the weight of the car is 3 kilograms lighter and the speed is at least 5 kilometers faster. Moreover, the most important point is that it is difficult for mountain bikes to maintain a stable speed for a long time because of design restrictions, and they need to ride fast and slow to recover their physical strength, while city cars and road cars can maintain a high speed for a long time.
The key to choosing a car: don't ride a car (male or female) that doesn't match the height and size of the car. Always stick to it (for example, at least 3-4 days a week, 20-30 kilometers each time). Medium speed (about 20km, you can know the speed by loading the code table). Keep the pedaling frequency high (the pedaling speed per minute is between 100- 130 for road bikes and 80- 100 for mountain bikes, which makes people feel different. You can know your pedaling frequency by installing a frequency device).
Road bike (professional triathlon of lightning brand in the picture above) (professional racing car of LIV in the picture above, Langma ADV 1) (low-end Volkswagen Langma SL3 of LIV in the picture below).
City car? The picture above is Liv Hollette No.2, and the picture below is Drake's.
Mountain bike, the first two pictures show LIV's high-end female professional mountain bike Liv Obsess Adv 2 (who won the xco Mountain Bike World Cup u23 Youth Championship twice). ? The third picture is LIv's Volkswagen Mountain Bike (tempt), which costs more than 1000 yuan and is suitable for getting started.
= Various models can be seen in several major official website of Giant: domestic simplified Chinese website, official flagship store of a cat in China, specialty store, and English website in North America (many models and high-end products can be ordered, such as v Obsess Adv). Finally, how to choose the height and length of the car: none of Giant's models will give a "geometric diagram of the frame (product)", and there is an adaptation table in it. The height and size must be within the adaptation range, so that the heel will not be problematic when running, just like buying sports shoes. Some brands don't give geometric drawings or only have one or two sizes, telling you that "1.6 to 1.9 meters are suitable", and it is best not to buy them (for example, sports shoes can cover both sizes).
Finally, many parameters and angles (that is, geometric design) of male and female cars are different (because of different physical characteristics). Here is an example: