Hello everyone! Brother Tiger has finally adjusted back from the state of returning to his hometown for the New Year (reversing the jet lag)! This year's Spring Festival, Brother Tiger returned to Xiangxi (Hunan Xiangxi Miao Tujia Autonomous Prefecture) and stayed there for a while. But because of professional reasons, although in the Spring Festival, the brain always left part of the "computing power" to the automotive-related fields.
This year, Brother Tiger returned from Xiangxi and brought back a very practical topic: Why can't the winter fetus be eaten in the southern region? According to the classic theory of the tire industry: the temperature is lower than 7 °C (or the road surface temperature is less than 5 °C), the traditional rubber begins to harden, the friction coefficient is reduced, and the risk of slippage increases, so it is necessary to replace the special winter tire (snow tire).
Because winter tire rubber is special, it can maintain very soft characteristics at low temperatures. The pattern is also special, and the dense and fine grooves can increase the bite force of the tire and ice and snow. However, in the winter tires in the summer, special rubber is easy to wear abnormally at high temperatures, so the tire industry recommends: the temperature is higher than 7 ° C (or the road temperature is higher than 5 ° C), to change back to the traditional tires.
Winter tires should be used in winter?
Although the theory is so, not many people use it
The theory says so, but in real life, it is not necessarily the case: first buy a complete set of winter tires is not cheap, and can only be used for one winter (from winter to early spring), and then you have to tear it down and throw it at home (or throw it in the store), is it worth spending this money? If the winter is too cold, it is not a big deal to drive slowly, drive steadily, and you can get to the destination as farther away as the car.
Therefore, in the mainland, basically only the "far north" riders who are "north of 40 degrees north latitude" (Zhangjiakou "ice pier" to the north) will think of changing winter tires in winter (this is also a big truth); and "ordinary north" riders actually have relatively less winter tires. And to the south... What is a winter tire???
There will be no snow roads in the south?
Northwest Hunan, Western Hubei, Sichuan have it!
As far as the Xiangxi region where Brother Tiger returned to my hometown for the New Year, you know, it is a typical southern region! Its geographical location is even south of the Yangtze River! However, the mountainous areas there are often between 700 and 1000 meters above sea level, and the topography is mainly a lava lyreen landform (karst landform). Winter and early spring are in a state of perennial snow. You can even stand at the foot of the mountain and look up and see a black and white "snow line".
In the county town at the foot of the mountain, the average altitude is between 400 and 600 meters, and the topography is mainly a flat area with a large area and a dense population. As a result, there is very little snow on the road that is visible to the naked eye, or there is no snow at all! But if you drive out of the county town and go to an old house in the mountains, the situation may be completely different!
You must ask: Does the snow chain work?
Locals actually use a lot of it!
But because it is located in the south, the locals do not use winter tires. What to do? - Snow chains used by locals! After putting on the snow chains, the car can walk on the snow and ice. When you reach a place where there is no snow on the road, remove the snow chains. - Because snow chains are not allowed to be used on normal roads!
If you don't remove the snow chains in time and roll the tires with the snow chains to a normal snow-free road, your ass will definitely protest to you first (imagine your wheels turning into gears)! Secondly, the road surface and the tires themselves can be scratched and crushed by snow chains (especially chains)! Finally, the snow chain itself may also be pulled off and worn off.
But snow chains are too sinful to use!
But it is precisely because of this that in fact, snow chains are really used, and many car owners are cursing! In the county town, even if there is snow or thin ice on the road, we still don't use snow chains (the thickness of the ice and snow is too low, and it is useless to hang the chain, but it is wrong).
When the snow depth is more serious, the wheel is obviously slippery and stops and hangs the chain. Even if a chain is replaced by a veteran, it takes at least a few minutes, usually a car needs to hang a chain to 2 wheels, and the bottom is not under 10 minutes. Coupled with the cold temperature and cold fingers are stiff and inflexible, hanging the chain is even more painful.
Snow all the way up the mountain, if you encounter a town halfway up the mountain, just when the local town government organizes manpower to clean up the snow on the road, you have to stop and remove the chain, the car drives all the way out of the town, and you have to get off the car and hang the chain... Endlessly, for middle-aged and elderly drivers, it is almost a living sin.
Heavy snow in the south through the eyes of off-road players:
Nothing is off-road tire + four-wheel drive can not be determined!
So the local car owner really arrived at the snow day, basically can not go out without going out, there are some things to delay for a few days. Unless there is something important to deal with, you have to go with a chain. The local driver is really headache for snow days. This phenomenon is not uncommon in the northwestern region of Hunan, western Hubei, Sichuan and other places.
So things fell into a strange circle here: southern car owners are not willing to spend a lot of money on winter tires, and then really encounter snow and can only rely on snow chains, but snow chains are too bad to use... And these dilemmas seem to be a problem in the eyes of off-road players.
Because the cars of off-road play enthusiasts are basically modified cars, the tires are basically off-road tires (RT) or even mud (MT), and the worst is at least the full road condition (AT). These tires have a deep pattern, a rough and exaggerated pattern, and can have a very good ability to clear snow in the snow, and the rubber of the off-road tire is generally not too hard (the mud anti-skid needs to be designed).
Ordinary home owners: Look
There is no "M+S" marking on the tire
Coupled with the vehicle's own powerful four-wheel drive system, off-road players don't care about the not-so-thick snow in the south. But for more ordinary car owners, they can only sigh. There is no professional off-road vehicle, and I am not willing to put on and take off the chain, it seems that there is only one last trick to refer to: find some tires with the "M + S" mark for your car (ordinary family car).
In fact, at present, products with the "M + S" mark are often more common in domestic independent brand tires (domestic manufacturers understand Chinese people better).
Usually the pattern of this type of tire will be relatively fine (in order to enhance the grip of the ice surface), and low temperature and high toughness rubber will be used to ensure flexibility at low temperatures. It is a tire that takes into account the different needs of ordinary weather and ice and snow days, and a tire is used for four seasons, which is more practical in the southern mountains.
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