Tires are usually installed on metal rims, which can support the vehicle body, buffer external impact, realize contact with the road and ensure the driving performance of the vehicle.
Tires are often used under complex and harsh conditions. They bear various deformation, load, force and high and low temperature during driving. Therefore, they must have high bearing performance, traction performance and cushioning performance. At the same time, it is also required to have high wear resistance and flexion flexibility, as well as low rolling resistance and heat generation.
1. Bridgestone: the tire is quite comfortable.
2. Michelin: good control in rainy days.
3. Goodyear: tires are more wear-resistant.
4. Horse: reduce tire noise.
5. Pirelli: the most outstanding sports performance.
6. Chaoyang and Hantai: they have obvious price advantages and high cost performance.
China's national regulations, in addition to the tire specifications, the manufacturer's trademark, level, maximum load, corresponding air pressure, production number, etc. shall also be marked on both sides of the outer tire. In order to identify the carcass cord, the sidewall is also marked with Chinese Pinyin letters. For example, m (or no word) represents cotton cord tire, R represents rayon cord tire, n represents nylon tire, Z represents radial tire, G represents steel wire tire, ZG represents steel wire radial tire, etc.
Nowadays, car tires are further developing in the direction of flattening. The flattening rate is the height / width ratio [(H / b) X100], from 60 ~ 80 to 50 ~ 70. More than 50, 55, 60, 65 and 70 are used, and a few cars have used 40 and 45 specifications.
The latest representation method of tire series in the United States, that is, the "letter number" mark based on "flat rate", for example, a tire is marked f78-14, where f represents the bearing capacity of the tire; The first number means that the "flat rate" is H / bx100. The number 78 indicates that the height of the tire is 78% of the width. The lower this value is, the more flat the tire section becomes; The second number 14 indicates that the rim diameter is 14 inches. The unit of bearing capacity is kg. The letters indicating the bearing capacity and the load are as follows: a-410, b-445, c-480, d-510, e-540, f-580, g-620, h-685, i-715, k-735, l-760, m-810, n-850, v-295, w-320, y-350 and z-375.
