Deciphering “the code on the tires”

Speaking of tire parameters, many friends have come into contact with the parameters we often talk about when buying tires, such as 245/45 R18, etc., but have you noticed that in addition to these parameters, there are many other parameters on the tires These contents play a very important role in our daily driving and the use of tires. These contents may be easily overlooked by us. Today, the editor will take everyone to interpret these “passwords on tires”.

The function of tires Isn’t a tire just a shoe carrying a car body, and it can take us to run when it is inflated? Obviously it’s not that simple. Let’s take a look at what the tires are: the primary function of functional tires is to carry the weight of the car body, followed by shock absorption. Whether it is Alto, Audi, Ferrari or Bugatti, no matter how strong the vehicle is Performance, if there is no tire load, it will only become a “car model” that cannot be moved.
Let’s talk about damping again. When you talk about damping, everyone might think of the shock absorber in the vehicle suspension system. In fact, the tires are also responsible for reducing and alleviating the vibration and noise of the vehicle when the vehicle is running.
Characteristics The acceleration performance, braking performance and steering performance of the vehicle have different performances through different patterns and formulas. The performance of different formulas and positioning tires will have obvious differences in these three aspects.
When choosing a tire, the wider the tire’s width, the larger the ground contact area. Under the premise of the same pattern and the same material, a larger width tire will have more grip and traction in a straight-line driving state. Good, but the fuel consumption level will increase accordingly, so we also need to weigh the pros and cons when we replace and upgrade tire specifications on a daily basis.
aspect ratio refers to the ratio of the height from the rim to the tread to the maximum width of the tire’s cross-sectional measurement, expressed as a percentage, that is, the percentage of the height to the width.
Regarding aspect ratio, most cars on the market use tires with small width, small inner diameter and large aspect ratio. A tire with a large aspect ratio has a long sidewall and strong cushioning capacity, which is relatively comfortable, but it has poor feedback to the road surface and weak lateral resistance during cornering. Conversely, tires with a small flatness ratio and large inner diameter have a thinner sidewall, which gives better feedback on the road surface, and a small change in sidewall shape, which greatly enhances the controllability of the vehicle. It is often used for vehicles with a sporty style.
R stands for radial tires. Radial tires are named after the tire’s inner cord weaving direction and the centerline of the tread at a 90-degree angle, resembling a radial on a globe. Generally, the crown part of this kind of tire will increase the steel wire layer, so that it can withstand greater internal pressure stress, has the characteristics of less deformation of the tread, better ground grip and stability, and is more suitable for high-speed driving. Today’s cars generally use radial tires.