everybody knows,carThe four wheels are equivalent to two legs of a person, and they are the most important parts in the walking process. And people usually have a pair of footwear under the feet, which not only has a beautiful vision, but also prevents the road surface from scratching the soles of the feet.So, as the "shoes" of wheelstire, How much do you know about it?
1. Solid red dots and hollow yellow dots
The solid red dot istireThe position with the greatest longitudinal rigidity means the point where the tire vibrates the most when it rotates one circle. If the vibration value is too large, the tire will vibrate. The hollow yellow dot is also called the light dot mark, which means that this part is the lightest spot on the entire circumference of the tire. Well, this is really cold knowledge for the average car owner, but don’t underestimate it, because sometimes you can show your profound knowledge when explaining to the opposite sex who doesn’t understand this knowledge. , May gain something ~
2. Why did the tires with normal air pressure still feel a little flat after testing?
When encountering this kind of situation, everyone must be thinking, should we give the tire some more air? In fact, there is no need to pump up any more, because nowadays cars generally use tubeless tires, and it is normal to feel a little flat under the weight of the car. When we are sure that the tire pressure is okay, even if it looks flat, it is a normal situation. So don't just think that your car should be replaced again! In general, the normal tire pressure of a car is 2.2 bar for the front wheels and 2.5 bar for the rear wheels, which will increase by about 0.3 bar after a period of driving.
3. The production date of the tire
How to tell the production date of a tire is very simple. "DOT xxxx" means that this tire has passed the standard certification of the US Federal Department of Transportation. There is no need to open the tire. Just outside the tire, on one side of the tire wall, there is a set of numbers. From the last four digits of the mark, you can know the production date. It consists of four digits "AABB". The first two digits "AA" indicate the week of the year, and the last two digits "BB" indicate the year. For example: the following tire, which is a tire on a car, the last four digits of the DOT mark on the car is 0807, indicating that it was produced in the 8th week of 2007, which is the end of February 2007.
4. About inside...
Well, now that English is popular, the editor won't say much. If the tires are installed reversely, it will seriously affect the comfort during driving, and most importantly, safety will be affected! In addition, reversed tires will wear out, so car owners must pay attention to the "inside" and "outside" positions when replacing tires!
5. Tire pattern wear inspection
In order to ensure the effectiveness of the pattern, countries around the world have formulated clear regulations on tire pattern wear limits. And the tire wear limit warning marks "△" and "TWI" English marks are moulded in several equal parts along the circumference of the tire shoulder. When the convex wear distance of the block is about 1.6mm (1/16 inch) to the bottom of the pattern groove, the pattern at the mark has been smoothed, so a narrow horizontal strip of light tread is revealed to warn the driver. So everyone should pay attention, don't wait for the pattern to be polished before replacing it.
6. Spare tire
When it comes to "spare tires", everyone may think of the affectionate "male second" in the TV series. Yes, as a solid backing for girls, they will always be unknown but they can give people an inexplicable sense of comfort and security. And what about the spare tire of the car? They either follow behind the "butt" of the car or lie quietly in the trunk. The use of spare tires should pay attention to the following points: regular inspection of the spare tire; do not put it together with corrosive materials; the spare tire also has a life span, and the general aging period is 4 years; due to the low frequency of use of the spare tire, the friction coefficient with the other four tires Different, so it is not suitable for long-term use.
The above is the cold knowledge about automobile tires summarized by the editor. Sometimes these cold knowledge can be of great use. Now you can take a closer look at the tires of your car, such as the date of production, the degree of wear, etc. Friends who plan to buy a new car can also pay attention to these. The editor reminds you that you must be better with the spare tire of your car. Although it may not reflect any value in its short life, once it is its turn, the effect is immeasurable.
Email: