Does the snow tire have a big effect?

Is the subject talking about snow tires or anti-skid tires? Snow tires should be the kind with steel nails on the surface, and most roads in China are forbidden to use them. . You must mean non-slip tires, right? Anti-skid tires have a certain effect, after all, they will not harden because of low temperature. .

Generally speaking, the tires we use can only have the ability to grip the ground by fitting the tiny bumps on the ground, but when the temperature drops to about 0 degrees, ordinary tires will harden (the lower the temperature, the harder it will be), and the hardened tire tread will not fit the uneven road surface, and the ability to grip the ground will also decrease a lot. The reason is the same as the shoes with tendon soles. Although they are quite wear-resistant, tendon soles will harden with the decrease of temperature, thus losing their grip ability. . When the temperature is about 0℃, the hysteresis effect of hardening will be reduced, the molecular adhesion and meshing effect will be weakened simultaneously, and the grip ability of ordinary tires in winter will be greatly reduced.

Snow tires use a combination of natural rubber and polybutadiene rubber. This polybutadiene rubber can be said to be the rubber with the highest elasticity and the strongest low temperature resistance at present. Its hysteresis loss is small, and its glass transition temperature can be as low as-105 degrees (vitrification is simply understood as hardening)! Therefore, the combination of these two kinds of natural rubber and polybutadiene rubber basically ensures that no matter how cold the environment is, the tire will not "vitrify", which is also the main reason for anti-skid tires. As for other textures and drains, they are all auxiliary! Just as shoes with tendon soles are as slippery as adult herringbone soles in winter, they will inevitably slip when they become hard!

As for the use of snow tires, it depends on where you usually use the car. I live in the northeast, Shenyang. I drive with rear wheel drive, and I haven't changed anti-skid tires in winter, because the snow removal in Shenyang is very strong. After the snow stops, the road surface is almost clean! Snow removal in other big cities in Northeast China is equally powerful, so it is generally unnecessary to drive in cities without anti-skid tires! If the snow removal in your place is not strong enough, such as some towns and counties, you should wear anti-skid tires in winter. Take the national highway between nanzamu and Hongtoushan on the edge of Fushun as an example. It will be covered with ice all winter, and it will not be cleaned even by the end of April next year. It is necessary to use anti-skid tires in this environment!

In short, the use of snow tires mainly depends on your environment and your driving skills, not necessarily! However, the use of non-slip tires is, after all, an extra layer of security. As for the effect, I haven't done any specific experiments. At the speed of about 40KM/h, it saves about 1 half body compared with ordinary tires.