When do you need to get a new tire, and under what circumstances do you need a new tire?

The tyre is worn to the warning sign, or the shoulder is injured, or it is badly damaged.

Hello! Here's how you can tell if a tire needs to be replaced

Point 1: If the tire is aging (for example, there are countless small cracks in the tread groove or sidewall that are about to hurt the carcass), the tire needs to be replaced in time, regardless of how long the tire has been used and how much it has been worn.

The second point: if the depth of the groove left in the tire pattern is at or below millimeters (there is an indicator mark indicating this depth in the groove of the longitudinal straight bar of the tire tread), the tire must be replaced, because the drainage capacity of the tire has been greatly reduced, and the vehicle will be more dangerous to drive in wetlands.

For example, although the tire can still be inflated after being crushed by the lack of air, it is recommended to replace the tire with a new tire in time because the internal structure of the tire may have been damaged.

If it is not very serious, it is enough to make it up, and if the wear has reached the warning sign, or it has been repaired many times, then it is better to replace the tire to avoid danger. If you need to change it, it is recommended to replace Giti tires, which are more cost-effective, not as expensive as Michelin, and more expensive than some small brands.

1.If the tires have worn out 2Multiple bruises.

Clause.

1. Cracks in tires

If you notice a crack in your tire, you have to change it. Tire cracking is caused by rubber aging, if there is cracking, it means that the tire has aged very seriously, the tire is about to "end of life", this time must be replaced. If it is not replaced in time, it is very likely that there will be punctures, air leaks and other conditions, and there is little point in repairing the tire at this time.

Clause.

2. Tires that have been repaired more than three times

Although there is a saying in China, called "three years of new and three years of old, and another three years of sewing and repairing", if the tire is repaired more than three times, do not brace it hard, it should be replaced. After all, there are too many tire repairs, and the tire pressure of this tire must be more serious, and the tire pressure of this kind of tire.

It is not stable enough, and there will even be air leakage, so it is better to replace it in time, after all, "changing the tire to ensure safety".

Clause.

3. Severe scratches on the side of the tire

The side of the tire is the weakest link of the tire, once it receives serious scratches or damage, the impact on the entire tire is great, and there will be great safety hazards.

Especially in the process of driving, there will be unstable tire pressure, which will lead to a side puncture, which is extremely harmful and must be taken seriously, if you find that the side of the tire is seriously injured, you must replace the tire in time.

If the tires need to be replaced

First, the tires are seriously worn.

There is a wear limit mark in the groove of the tire tread, which is about 2mm thick. It is recommended that the tire should be replaced when the thickness of the tire is worn to a distance of 4mm from the limit mark, which is about 6mm from the deepest part of the groove.

Second, the tires are seriously aged.

Maintenance professionals suggest that the tire replacement cycle is generally 3-5 years or 3-50,000 kilometers. Due to the different use environment, to judge whether the tire needs to be replaced, you should first look at the wear and then look at the age.

If there are cracks in the tread and wall of the tire, even if the tire is only used for one year, it still needs to be replaced. Even if the tire is not worn out significantly, it must be replaced after more than 5 years of use.

3. Tire bulge and deformation.

If the car tires are bulging, then the car can not be used at this time, and the continued use of the bulging tires will cause the tires to burst, so they should be replaced in time when encountering such a situation.

There is also too much tire repair can not be used on the highway, because the speed of the high speed is relatively fast, then it is easy to cause the car to burst, if your tire has been repaired three or four times, then it should not be used for a long time.

At this time, it can be put into the spare tire to use, after all, the frequency of use of the spare tire is relatively small, and almost all the current cars are full-size spare tires, so it is not recommended that you use them for a long time.

Car tire purchase tips:

1. Recognizing the tire specifications is the first step in how to buy car tires, and there will be this mark on the edge of the tire; The meaning of these numerical marks refers to the tire width, flat ratio, wheel diameter, and load index, and only by mastering these data can you buy the right tire.

2. Tire pattern is also one of the skills for buying car tires. Different patterns of tires have different adsorption and drainage forces on the ground, and the patterns of tires on the market are also divided into symmetrical patterns and asymmetrical patterns. There is also a difference between the two in terms of function and installation.

3. Tires with symmetrical spike patterns can be installed at will regardless of the inside and outside. For tires with asymmetrical patterns, it is necessary to guess the potato key to distinguish the inner and outer side installation. If it is reversed, it will have the opposite effect.

4. Tire cross-section, but also one of the skills we need to master the purchase skills of automobile tires, different tires, its cross-section is also different, some are more square, some are more sleek. Compared with sleek tires, tires with a square tire cross-section are slightly inferior in grip because of friction.

With the exception of broken, bulging tires, tire life (replacement) is determined by two indicators:1Time. 2.Degree of wear. Which item comes first and which item is replaced by which.

Two. Degree of wear: It is not appropriate to emphasize the reference number of kilometers traveled, mainly depending on the degree of wear.

Because of the weight of the car itself, daily light load, full load, tire quality, etc., these factors will have different or even greater tire wear under the same mileage. And many car owners can't remember the mileage at all after changing tires. The following two methods can be self-tested:

1.Look at the tire: between the tire treads, there are three or four annular grooves (drain grooves) around the tire, and there will be a "bump" mark (mm height) in the grooves, which is lower than the tire tread next to it, and when the tire pattern wear is the same as this bump, it means that it needs to be replaced.

This is a "wear mark" specially designed by many manufacturers for the safe use of tires (but not all brands of tires have this mark). Drawings:

2.If the tyre does not have wear marks, it can be tested with a special measuring tape: when the ruler is graduated in millimeters, it has reached the safety limit and must be replaced. Drawings:

3.The following tire has worn off a lot of wear marks, which is beyond the limit and very dangerous. Drawings:

Wheel Xunhui loss tire 5 years or 80,000 liters need to be replaced, the longer the tire has a tread deformation, the risk of puncture will be higher, in order to make the tire service life longer, you can change the tire position every 1 to 20,000 kilometers. Generally, the front wheels are more worn than the rear wheels, and the front and rear swaps are to make the tires wear more evenly.

Tires are worn to the limit mark, tires reach the end of their useful life, if the sidewall is damaged or multiple tire repairs are made, tires bulge.

1. The tire is worn to the limit mark and needs to be replaced. Each tire has wear marks at the bottom of the tread groove. The wear marks of car tires are generally millimeters high, and if the tires are worn below the limit mark, the tires need to be replaced.

If the road surface is wet with rain and snow, the water in the tires cannot be completely discharged, and the vehicle is prone to loss of control.

2. The tire needs to be replaced when it reaches the end of its service life. The service life of tires is generally about 3-5 years. When the service life of the tire is more than 5 years, the tire will crack and age.

Aging tires will lose their original elasticity, and tires will deform if they continue to be used. This is equivalent to planting a time bomb. I don't know when it will be**.

3. If the sidewall is damaged or the tire is repaired multiple times, the tire needs to be replaced. Two tire repairs may not affect the use of tires, but more than three times, for safety reasons, Bian Xiao still recommends changing tires; The sidewall of the tire is badly damaged, it is useless to repair it, and the tire must be replaced. Because during driving, it will be repeatedly squeezed here, and it is easy to risk a puncture.

4. The tire bulge needs to be replaced. Once the ply layer is damaged, the air pressure in the tire will be out of control, resulting in uneven force on the outer tire, and the parts with high force will protrude, resulting in "bulging". Therefore, in the process of daily driving, car owners should try to avoid speeding on pedestrian crossings, avoid frequent driving on uneven roads or hitting curbs, which can easily make tires bulge.

If you notice a bulging tire, replace it immediately, even if it's new.

Generally, tires should be replaced in about three years; In fact, as long as you drive normally, five years is not a problem.

The timing of a tire replacement is related to a number of factors that still need to be analyzed in detail:

1. Frequency of vehicle use.

For family cars, they are rarely used except for occasional work and weekend outings, so that the replacement time of the tire opening hall can be appropriately extended, and the tires can also be replaced every five years.

For commercial use, if you run outside a lot, you need to shorten the tire replacement time, generally about 4 years to replace the tire.

Second, the driving habits of the owner.

Some car owners like to accelerate or brake quickly when driving, some car owners will step on the accelerator on the spot, and the tires will spin in place to emit black smoke, these bad driving habits are harmful to the tires, and the replacement cycle of the tires should be shortened accordingly.

Third, the use environment is also relevant.

If the car is often driven in saline-alkali land, the quiet and hidden saline-alkali corrosion of the tire is more serious, so the cycle of replacing the tire should be shortened, generally about three years to change the tire.

There is a wear mark in the middle of the tire pattern, and when the tire pattern is worn to this mark, it means that it is time to replace the tire. When a large number of cracks appear on the tire, it is an indication that the tire is aging and should be replaced as soon as possible, even if it does not meet the wear mark.

Any brand of tires will set a wear mark at the bottom of the tread groove, generally the height of the wear mark on the car tire is mm, and the height of the wear mark on the truck tire is mm. When the side of the tire is swollen and deformed, it means that the inside of the tire has been damaged.

Generally, the normal life of tires is about 5 years, and once this time is exceeded, the tires will begin to age. The main manifestation of tire aging is hardening of the surface, followed by cracks. Aging tires will lose their due elasticity, and if they continue to be used, they will cause the tread to deform, and there is a risk of puncture, so they should be replaced in time.

The date of manufacture of the tires can be found from the tires. (Photo by Wu Jiahong, Pacific Automobile Network).