Phenomenon 1: unilateral wear, "commonly known as eccentric wear" diagnosis: the wheel is excessively inclined or introverted, which is often caused by poor wheel positioning.
Suggestion: Correct mechanical problems and maintain standard air pressure. If necessary, replace the front and rear axle tires regularly. It should be noted that radial tires and bias tires must not be mixed on the same axis because of intermodulation.
Phenomenon 2: Partial wear caused by braking Diagnosis: Correct the brake system if necessary.
Advice: When the vehicle owner is driving, he must avoid emergency braking.
Symptom 3: The rubber block of the tread is cut off Diagnosis: When driving on the road, sharp foreign objects including debris may chip off the tread rubber and may damage the steel belt or the carcass cord fabric.
Recommendation: Avoid rolling on foreign objects and debris while driving on the road.
"Tread lip failure"
Phenomenon: Drum kits diagnosed on the side of the tire: damage to the bead due to incorrect tire installation.
Improper use of tire mounting equipment may cause the wire at the bead to bend and deform or even break, damaging the rubber.
Recommendation: Use the tire mounting equipment correctly when disassembling the tires, apply special lubricants for the tires, and properly install the rims.
Special cautions: Cracked or bent deformed bead wire may cause blasting during inflation or tire removal, resulting in casualties.
"Tire puncture"
Diagnose one: The "flat tire" caused by rapid air leakage will be completely deflated immediately when it is cut or severely collided with foreign objects, which may result in puncture.
Advice: Try to avoid pits while driving, especially when driving at high speeds, and avoid obstacles on the road.
Diagnosis II: There are three main reasons for chronic leaks caused by chronic leaks caused by chronic leaks: 1. When the car is driving, tires are nailed or cut to cause damage to the inner liner, resulting in chronic leaks.
2. After nailing or being cut to cause damage to the airtight layer, repair is performed. However, poor repair may also cause chronic air leakage of the tire.
3. When the tire was installed, the air leakage was not checked and installed according to the correct operation procedure, resulting in insufficient air pressure. For example, if a new valve is not replaced, the joints of the valve valve core, the bead lip, and the bead flange are not checked for leakage after the tire is installed, and the air pressure is insufficient due to installation problems.
Advice: The main preventive measures for vehicles are in advance, and the key inspection areas include treads, bead and bead. The tread should be inspected for any bad repairs, whether there are nails, cuts, etc.; the bead is to be checked for the presence of cuts and punctures; the bead must be checked for damage.
If the tread, bead and bead are intact, then we should also check the valve to see if there is aging or breakage. Check if there are any problems with the rim. In addition, the tires were not properly installed, and they were not checked for leaks after installation. The occurrence of chronic leaks also caused “flat tiresâ€.
When installing tubeless tires, it is best to replace the valves for safety reasons.
"Side failure"
Phenomenon: Diagnosis of the sag of the bead: The sag of the bead is caused by the joint of the bead cord. The part of the joint is the local reinforcement of the carcass. When the tire is inflated, this area will have less air expansion than the area without the joint, causing a partial depression of the bead.
In fact, not all the sag of the bead will affect the safe use of the tire. The carcass joint is the overlap of the carcass material (polyester cord) at the joint, in order to obtain a firm joint between the two parts of the carcass. Part of the tire joint causes the straight strip depression of the bead to be a relatively solid part of the tire carcass and will not affect the safe use of the tire. In general, the recesses caused by the carcass cords correspond to the positions on both sides of the tire, which is also a way of judging whether the recesses are normal due to the problem of cord joints.
In addition to the normal sag of the bead, the rest of the dents will cause the owner to pay enough attention. This may be a tire failure caused by the cutting of the tire bead, the breakdown of the tire bead, or the degradation of the rubber.
Recommendation: Do not allow tyres to come in contact with hydrocarbons, solvents or certain acidic substances. Once these materials contact the rubber part of the tire, chemical changes occur in the rubber within a short time, causing the tire to expand, soften, or stick.
"Internal failure"
Phenomenon: Tyre bulging is even diagnosed as lack of glue and leaks: the rupture caused by overstretching the carcass cords. When the car is running, the tire shoulder or the bead part close to the shoulder is strongly impacted by foreign objects such as potholes, curbs, and large stones, and the tire generates severe pressure between the rim flange and the impact material. To deform.
Recommendation: Check the tires. Check the tire bead bulging five steps.
In the first step, with the tire inflated, a double vertical bar mark is made with chalk on the tire bulge. The purpose is to determine the bulge range and make preparations for inspection after the tire is deflated.
In the second step, after the tire is deflated, before the tire is removed, check whether there is black rubber on the flange of the rim corresponding to the bulge position to determine if the tire has been subjected to an impact. Note that it is not always necessary. Black rubber impressions can be found.
In the third step, if the tire is strongly impacted by foreign objects, an impression will be left in the airtight inner layer of the tire after one or two places have been squeezed.
The fourth step, check the bead part.
When the tire hits foreign objects, the bead is prone to bruise under the impact between the impact and the rim flange.
In the fifth step, inspect the airtight layer in a well-lighted place to see if there are any injuries caused by the impact. In severe cases, the airtight layer may even be crushed.
Tyre bags have to be repaired or replaced in time.
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