Questions about car tires! 50

It means that the cross-sectional width of the tire is 205mm, the flattening rate is 65mm, the outer diameter of the steel rim is 16 inches through the inner diameter of the tire, and the maximum speed parameter v!!

Then the formula used in the case of not changing the speedometer value above is 215 50 r16, 225 45 r16, and the next 2 will change the wheel hub 215 45 r17, 225 35 r18!!

The error of the above speedometer value is negligible!

Recently, I prefer to change tires with a width of 215 sections, the width is wider, the grip friction is enhanced, and the driving performance has been improved.

It is not recommended to widen even that, because the tread may be killed by the wheel room guard when cornering, and it will become an accident!

The speed level is recommended after the English number V, the highest value of V is less than the W sign, W seems to be the highest speed of 240 kilometers, this value is the same as the concept of oil grade, the higher the value, I think the more heat-resistant the tire is, the less likely it is to burst tires!

I prefer the original parameters, generally the original parameters are the most suitable for the car, but the brand and tire level can be improved.

If you want to improve the tire level, it is worth reminding that if you want to improve the grip of the vehicle, then the replaced tires will perform poorly in terms of wear resistance and noise; If you change to wear-resistant tires, the traction it provides to the vehicle will be weaker; Tires with a high flatness rate feel comfortable, but the road feel will be poor, and the vehicle will have poor lateral resistance to cornering; In contrast, tires with a low flatness rate give the vehicle better handling, but at the expense of some ride comfort. Therefore, car owners must be clear about their needs and purposes when choosing tires, so that they will be more targeted!

According to the requirements of the car manufacturer, the tire size cannot be replaced. However, some friends are willing to widen the tread width, increase the size of the wheel, and change the method without changing the road code gauge without changing the road code table, that is, +10 -5 port unchanged, +20 -10 port unchanged, +10 -10 port +1, +20 -20 port +2. Please follow this principle and consider its mechanical factors.

Rim +2 is the recommended maximum!

The landlord opened it and took a look, if you can't see the nylon thread inside, there is generally no problem, if it is exposed, then you need to replace the tire. Such as satisfied.

1. The surface is evenly worn

Problem: Uniform wear of tires is a normal phenomenon, and all parts of the tire will have corresponding performances, and the pattern and the effect of draining water from the road are important links in maintaining the grip of the car. Once the pattern has been dried, the life of the tire has reached the end of its life and must be replaced.

Solution: Do not make your own tire pattern spring fingers. If the wear has reached the standard depth of the tire pattern (usually 2 mm for tires with a width of more than 175 mm), it is necessary to replace it.

Of course, there will be a difference in the degree of wear. But be aware. The difference in wear of different tires on the same axle must not exceed 5 mm.

2. The outer edge is worn

Problem: If you look in the direction of travel and there is a lot of wear on the outside edge of the tire, it means that the tire is often underinflated, i.e., the pressure is not enough.

Solution: Check the tire pressure several times. If possible, inflate at "highway" standards – i.e. add another 30,000 pascals to normal standards.

In addition, it is generally believed that since the tires are not inflated enough, they are good for driving on snow and sand, and this is also true on wet ground. It should be noted that under-inflated tires are very bad for driving in rainy conditions, and grip will be significantly reduced.

3. Convex and corrugated wear

Problem: If you find that the two sides of the tire landing part are convex and worn, and the tire perimeter is also corrugated worn, it means that the shock absorber, bearing and spherical coupling and other parts of the car are seriously worn.

Solution: Due to the high cost of replacing new tires, it is recommended that you replace the tires before replacing them. First, check the wear and tear of the suspension system and replace the worn parts. Otherwise, even changing the tires won't help.

4. Tire "internal injury".

Problem: After a vehicle collides with a hard object (e.g. on the edge of a sidewalk) or after driving with a flat tire, the rubber layer of the tire can be severely scratched, affecting the degree of sealing.

The solution is in this case. Tires can go flat and crack. If the wound is small, it can of course be repaired to meet the needs of the emergency, but if you want to drive long distances, you must replace it immediately.

The four wheels of the car, including the spare tire, must be checked regularly every month. During the inspection, it is necessary to observe whether there are cracks or scratches on the surface of the tire, and it is best to wear gloves and reach to the inside of the tire to check for suspicious marks. If you find the slightest suspicious point, you should immediately ask the car dealer for a detailed inspection.

If you find that the surface wear of the tire is abnormal, you should think that there may be a problem with the toe-in adjustment of the wheel and need to be repaired.

Tires are one of the hard-working "employees" of our cars, and the working environment is quite complex, without them, the other performance of our cars is useless. Therefore, we must regularly inspect and repair the tires of our car, not to mention the maintenance matters, good things are maintained!

<> "Car Trivia: Have You Chosen the Right Tire, Choosing the Right One Is Saving Money."

It is rumored on the Internet that many Michelin and Continental brand Lunkai Chi Li tires are not wear-resistant, because the rubber is too soft and easy to be soft, so the grip is more ruthless, although the mute effect is good, but it sacrifices the wear-resistant performance.

There is also a saying that Bridgestone's tires are more wear-resistant, because Bridgestone has more toner content in tires and harder tires, but although this can increase wear resistance, the strength of the search is not enough, although the life is long, but the noise is also very large.

But in fact, it is not the brand that really determines whether a tire is durable, but the wear resistance index of the tire. On the side of any tire, the wear index of the tire is marked, also known as the "treadwear index". For example, we see "treadwear-400" on the side of the tire, which of course means 400 wear resistance index.

So how did the abrasion index come about, the tread wear index test was carried out in the United States**, which is a 644 km (400 mile) highway near San Angelo, Texas, USA, and all the vehicles tested will pass through the same lane at the same time, ensuring the same experimental conditions.

The same measurement will be made according to the tread depth measurement of the reference tire every 1,288 kilometers, and then after 11,592 kilometers of testing, the wear degree of the test tire and the reference tire will be compared, and the tire grade will be determined according to the relative wear resistance. The wear index is used to measure the wear performance and service life of the tire. Of course, the wear index is only suitable for comparison between products of the same manufacturer, and cannot be compared between different brands.

However, in fact, because the measurement method and road are the same, although the wear resistance index between different brands cannot be directly compared, there will not be too much error. In fact, the Michelin Energy XM 1+ series, which is not flexible and grippy, has an astonishing abrasion index of 520, while the re71R of Bridgestone, which is known for its wear-resistant and tough, is only 200.

Therefore, the actual case will slap many incorrect views and statements in the face. Even if there are different series and different specifications under the same brand, the wear resistance index can be very different. So the statement that "wear resistance by brand" is not correct!

When choosing tires, the best way to judge whether they are wear-resistant enough is to communicate reasonably with the seller before buying, and specifically inquire about the wear resistance index of the corresponding tires.

Volkswagen has, FAW-Volkswagen, Shanghai Volkswagen, there are many models of cars, I don't know which model you are talking about, and which brand of tires, the rim is an iron rim or an aluminum alloy rim, the more common ones are: 185 70R13, ordinary Santana, relatively cheap, no matter what brand of tires, single tire ** is almost around 200 yuan;

185 60R14, Jetta's, single tire ** in 300 yuan to 450 yuan, according to different brands, ** different; 195 60R14, Santana 2000, single tire ** between 300 and 450, different brands, ** different;

205 55R16, Passat's, single fetus ** in 500 to 700 yuan, different brands, ** different;

I won't list them all, according to the brand, Kumho, Hankook and domestic brands** are relatively low; Place Barrel, Yokohama, Kenda, etc. belong to mid-range brands; Michelin, Goodyear, Sumitomo, Continental, etc. belong to high-end brands, you can see for yourself what exactly it is, and then say it!

Michelin is more expensive, 300, other brands 200

Hankook's most water, 100

Anyway, the price of ** is far from the price you buy a new one.

Can you go and inquire? How much do new tires cost?