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In life, tires are a very important part of the operation of the car, so where do you need to repair them when there is a problem or damage to the wheel rim of the tire?In fact, this is relatively simple. Usually, you can go to a special repair shop or the 4s shop of the car for a comprehensive overhaul. Before performing repairs, a comprehensive inspection must be carried out to clarify where the problem occurred, so that not only can the repair time be saved, but the repair will also be more perfect.Some wheels have a little damage and scratches on the surface, but other problems are not big. This kind of problem is the simplest to deal with. Only a simple surface repair and a comprehensive spray of paint are required. However, if it is because the car has experienced a more serious collision or other scratches, causing it to deform, etc., it needs to be restored first and then the next step of painting and other treatment, so as to better restore the wheel as a whole.Finally, when it is in severe deformation and there will be serious damage, it needs to be completely replaced. In summary, we can summarize that the specific repair work of the wheel rim is relatively simple, that is, a simple and comprehensive cleaning work is carried out along the route to further clarify the degree of damage, and then carry out detailed further treatment.In particular, it is necessary to remind the majority of drivers and friends that the inspection and cleaning of tires and wheels must be carried out frequently in life, so as to be more conducive to driving and safety.

The rim et value means the offset value, which represents the deviation distance between the rim mounting surface and the center line of the rim. The wheel rim et value can be divided into positive and negative offset distance and zero offset distance. When the wheel rim et value is larger in the positive direction, it means that therim mounting surface is inward. The distance indicates that the mounting surface is in the middle of the rim. Does the larger the et value, the more prominent the wheel rim? This is not the case. The larger the et value of the car rim, the more inward its mounting surface is, so it does not protrude outward, but indents inward. Generally, those four-wheel drive vehicles will use wheels with a negative et value, in order to increase the wheel spacing to make the vehicle more stable, and to make the best use of their high-performance tires. Our ordinary vehicles generally use wheels with positive et values, because ordinary vehicles do not pursue the ultimate driving performance, and generally prefer safety. How to choose the et value of the car rim? When choosing a car wheel, you should consider the configuration of your own vehicle, and you cannot choose a new wheel that is too different from the original wheel size. If the selected wheel rim et value is not suitable for the own vehicle, it will lead to the deviation of the driving direction of the vehicle, or the work of the braking system will be affected, and increasing the braking distance will affect the driving safety. In addition, you can judge according to your own model. If it is a four-wheel drive vehicle, you can choose a wheel with a negative et value to increase the driving performance. If it is a general two-wheel drive, choose a wheel with a positive et value.

The size of the car wheel rim will have different effects on the carrying capacity of the car, the performance of cornering, etc.The specific use of large and small wheels, the owner can choose according to the difference between the two. 1. In terms of carrying capacity, large wheels are stronger than small wheels.In order to save costs, small wheels usually choose steel materials, while large wheels choose to use aluminum alloy in materials, especially the forging process is better, and the carrying capacity is 5 times that of ordinary steel wheels. 2. The performance of cornering.When the wheels are cornering, large wheels can improve the cornering performance of the vehicle.After the wheel rim is modified, the grounding area of the tire is increased, which can increase the grip, so that the vehicle's smooth cornering performance is improved, which is conducive to the safe cornering of the car.The small wheels do not perform as well as the large wheels in terms of cornering performance. 3. In terms of comfort.The larger the tire, the thinner the thickness of the tire, resulting in poor noise on the isolated road, then there will be more noise in the car.Small tires, to a certain extent, can reduce noise and make driving comfort higher than large tires. 4. Car performance.Because of its large size, large wheels will affect the acceleration and braking of the car.The larger the tire, the more its weight will increase, and the car needs to consume more fuel to be able to support the operation of the large tire.Because of its relatively small size, small wheels will use less fuel than large wheels in terms of fuel consumption, which can also accelerate faster than large wheels.

If the wheels of our cars are rusty, the following methods can be used to solve it.： 1. You can use very fine water sandpaper dipped in water and gently rub it on the rusty place to remove the rust spots and then apply a layer of primer, so as to ensure that the rust spots will not expand. If it is a relatively new scratch, apply the primer directly after wiping, the effect is better. 2. The above method is to directly polish and then spray primer for relatively small rust marks. Although it can solve the problem on the surface, it cannot solve the problem fundamentally, because the primer may fall off after a period of time. In fact, the most correct method is to polish and paint the wheel rim when it is scratched but not yet rusty, so that there will be no rust and corrosion. 3. We need to rinse the edges of the tires of the car with water first, especially the dirt inside. The second is to spray the rust remover evenly on the rust remover in an appropriate amount. After waiting for a period of time, use a sponge to wipe the surface repeatedly, and the rust on the wheels will disappear. 4. You can choose to put oxalic acid on top of the rust, then drop a few drops of warm water, wipe it gently, and then wash it off with water. This operation must be done quickly to avoid corrosion. Lemonade can also achieve the same effect, but it will leave a light yellow color that is more difficult to remove. Under normal circumstances, our aluminum alloy wheels are not easy to rust, but if they are made of steel or iron, they will rust more easily. It is better to choose aluminum alloy.

In daily use, the wheels of the car may be deformed, which will affect the maneuverability and grip of the car to a certain extent. 1. First of all, the wheelrim, as an indispensable and important part of the car, bears the main impact and pressure of the vehicle.Therefore, once the car wheels are deformed, it will affect the reliability of the vehicle and reduce the grip of the car wheels. 2. The deformation of the wheelrim of the car will increase the difficulty of manipulating the car while walking, causing the car to travel unevenly.Even if you drive on a gentle main road, it is inevitable that there will be shaking. 3. After the wheelrim of the car is deformed, there will be a difference in the degree of force of the car tire, which will shorten the service life of the tire. During the long-term use of the vehicle, it will be affected by various external environments and various failures may occur. Automobile wheels are directly exposed to the outside world and bear the main pressure during driving, which is prone to deformation, scratches and other failures. The main material of the wheelrim is aluminum alloy, which has good strength and compression resistance.Therefore, during long-term use, if the metal fatigue occurs, it can easily cause deformation.Most of these deformations are caused by hitting foreign objects.If this deformation occurs for the first time, we can buffer the buffer sponge and other substances in the groove, then restore it with a hammer, and then polish it with sandpaper, spray paint and paint.If the wheelrim is severely deformed or has been deformed and repaired two or three times, it must be replaced in time, otherwise it is very likely to cause the internal fracture of the wheelrim and endanger the safety of the vehicle.

A negative-value rim measures the deviation value between the fixed surface of the rim and the centerline of the rim. Therefore, when a negative-value rim is a larger negative value, it means that the greater the deviation distance of the rim, the greater the degree of outward tilt. When you see the word ”offset", this will have an impact on the performance of the tires and the performance of the wheels, and it will also have an important impact on the performance of the car.Because of the offset, the wheel spacing will be affected.To a certain extent, it will affect the grip of the vehicle tires and the stability of the vehicle.The offset is the value that represents the difference between the stress surface of the rim and the center datum of the rim, in mm. If the stress surface of the rim is outside the central datum, the rim will be a positive rim at this time.Under normal circumstances, the positive wheel rim is used as the original wheel rim of the car.Safe, stable, and does not produce additional air resistance, which is the advantage of positive wheels.On the contrary, when the stress surface of the rim is inside the center datum, the rim will be a negative rim at this time. Due to the large wheel track width, it can provide better stability for the car, and it can also allow the tires to better exert their lateral support ability, which has become the advantage of negative wheels.However, negative-value wheels are usually on the outside of the body, which will cause a certain degree of resistance, and it is easier to scratch other objects.In simple terms, the negative rim can provide greater support. The recording method of the offset value of the wheel rim is generally etxx. ET+20 means that the offset value is +2cm; Et-20 means that the offset value is -2cm.Usually, the maximum value of a positive value is +50, and the maximum value of a negative value is -44.

In the 1990s, in order to meet the needs of modern warfare, the lightweight of weapon systems has become the trend of the development of weapons and equipment in various countries around the world. How to reduce the weight of structural parts designed according to the strength index is the key.As an important part of the wheel, it is an important part of how to reduce weight. The weapon systems used in the past were all steel wheels. The steel wheel structure designed according to the strength index is heavy and has low fluidity, so aluminum alloy wheels have become a better choice. Aluminum alloy wheels produced by non-casting methods and their manufacturing methods reduce the weight of the product and improve mobility. The wheels include aluminum. The weight ratio of the elements in the alloy is aluminum 100, copper 1.4-4.8, magnesium 0.4-2.8, zinc 0.3-7, titanium 0.1-0.15, nickel 0.1-1.5. The manufacturing of aluminum alloy wheels is controlled within the above composition range, smelted at 670-720℃, filtered with ceramic tubes, heated and insulated before forging, forged, and the molten metal flows evenly around the ingot through the casting funnel during the water cooling process. The forging temperature is 420-460℃, the heat preservation is 3-5 hours, and the heat treatment is carried out in a vertical quenching furnace. While ensuring the performance indicators of the finished wheels, aluminum alloy wheels greatly reduce the weight of the finished wheels and improve mobility.

When our vehicles need to replace tires, in most cases they replace tires of the same specifications, but I don't know if everyone has ever thought about whether it is feasible if we replace tires of other specifications without replacing the wheels?The answer is yes, as long as you refer to the wheel tire comparison table to select the tires that can be installed. Because the use of tires of other specifications without replacing the wheels involves the concept of the J value of the wheels, let's first understand the J value of the wheels. The width of the rim of the wheel hub is the J value of the wheel hub, in feet. For example, the J value of the rim corresponds to the tire width of the tire.The J value of each rim corresponds to a standard tire width, but in addition, it can also install tires with larger and smaller tire widths.We can choose the selection criteria against the picture above. R im width(J ) Recommended size （mm ） Applicable minimum size （mm ） Applicable maximum size （mm ） 5.5J 185 175 195 6.0J 195 185 205 6.5J 205 195 215 7.0 J 215 205 225 7 .5J 225 215 235 8.0 J 235 225 245 8 .5J 245 235 255 9.0 J 255 245 265 9 .5J 275 265 285 Let's take a wheel hub with a rim width of 7.5J as an example. The corresponding standard tire width is 225, but it can also install tires with a larger tire width of 235 and a smaller tire width of 215.If you still want to install tires with larger or smaller tire widths, you have to replace the wheels .

Many car owners drive fast in order to have the most fun driving.Even if the road is really potholed, it doesn't slow down, and it coaxes the throttle to rush. I never knew that this behavior would hurt.Especially those explosion-proof tires with low flat-to-flat ratio, they are not only thin, but also very hard.When this kind of tire is subjected to a strong impact, it will directly transmit force to the wheel rim.This can easily cause the wheel rim to lose its roundness. Symptoms of roundness of the wheel rim： The most intuitive feeling caused by the roundness of the wheel rim on the driving experience is that the vehicle is biased, the body and steering wheel shake severely, and the degree will increase with the increase of the speed.In addition, the loss of roundness of the wheelrim will also cause a great impact on the chassis suspension, and it will seriously cause deformation or even fracture of the control arms of the suspension. How to deal with the roundness of the wheel rim： Since the current wheel rim material of automobiles is mostly aluminum alloy, once the wheelrim is out of roundness, it is extremely difficult to repair. Even if it is repaired, the wheelrim will not be in the best condition at the factory.Therefore, generally, if the wheelrim is out of roundness, it is recommended to replace it directly.

The finished aluminum alloy wheels are treated with anti-oxidation. The present invention adopts a special cast rod. After forging and heat treatment, the tensile strength is 570MPa, the yield strength is 540MPa, and the elongation is 15%. Compared with the wheels of the same specification, the weight can be reduced to 17.2kg, which greatly reduces the weight of the product. Through the anti-oxidation treatment of the product, the problem of easy oxidation of aluminum alloy wheels is effectively solved, and the requirements of existing trucks for wheels can be met. At this stage, the aluminum alloy wheels forged in our country use 6061 grade aluminum alloy (LD30). Compared with traditional steel wheels, it has the advantages of light weight, beautiful appearance, and good heat dissipation performance. However, due to the limitations of 6061 material, under the existing commonly used forging methods, its good mechanical properties can only reach the tensile strength of 350Mpa, the yield strength of 320MPa, the elongation is about 12%, and the finished product of a 6061 aluminum alloy truck wheel is about 25kg, so its tensile strength, yield strength, elongation and weight can no longer meet the requirements of existing trucks for wheels. Forging: The front surface of the cast rod is pre-forged with a pressure forging machine, forged into a bowl shape, and then the back of the cast rod is forged once with a pressure forging machine, forged into a cylindrical shape, and the cast rod is rolled into a forged billet with a spinning machine. The forged billet is in the shape of the edge of therim. Heat treatment: solid solution treatment of forged billet, solution temperature 465-475℃, solution time 2-3 hours, quenching within 15 seconds after solution treatment, quenching temperature 40-60°C, time 85-95 seconds, aging treatment after quenching, aging temperature 115-125°C, aging time 22-24 hours.

The wheel rim, also known as the hub, is a barrel-shaped metal part. The center of the tire is mounted on the shaft. The decorative cover of the wheel is generally fixed in the center of the wheel to beautify the appearance of the wheel and protect the wheel and the central rim. At present, part of the structure of the decorative cover of the wheel is directly fixed and welded to the wheel. Today we will show you the benefits of using the aluminum alloy wheels . The connection will damage the surface finish of the wheel, the operation is more complicated, and the quality of the connection is not guaranteed; the other part is the rim decorative cover, the mounting hole on therim is fixed to the rim, for example, the decorative cover is mounted on the rim surface of the wheel through a pawl. Although the operation is simple, the installation size cannot be adjusted. The aluminum alloy wheel rim includes arim body, the middle of the rim body is provided with a mounting groove, the bottom of the mounting groove is provided with a central hole connected to the axle socket, the edge of the mounting groove is provided with a stepped hole, and the step hole of the decorative cover is provided with a step hole. The center hole of therim body is provided with a snap ring close to the outer surface of the rim. The decorative cover includes a decorative surface that matches the external shape of therim body and a mounting surface located inside the rim body. The outer side of the lower end of the buckle is provided with a protrusion, and the inner side of the lower end of the buckle is provided with an adjustment groove corresponding to the protrusion.

During the driving process, car owners will be more concerned about the paint scratches on the car, but have they ever paid attention to the scratches on the wheels?How can I repair the wheel rim if it is scratched? The specific methods for repairing the wheel rim are: 1. Check for scratches, and carefully check whether the scratches extend to the inside of the wheelrim. If not, you only need to use paint thinner and slowly wipe the surrounding scars. It can be easily repaired. 2. If the scratches on the wheel rim are deep, it will be difficult to clean up the stolen goods next to the scratches. At this time, you need to use a small toothpick to clean it thoroughly; 3. Before repairing the scratches on the wheelrim, you must first use tape to paste the place without scars, so as to avoid accidentally painting irrelevant parts; 4. After finishing the tip of the brush, apply a modified paint, and wait for the paint to shrink slightly after drying, it is best to apply it slightly protruding for easy observation; 5. After painting, wait for about a week to make it completely dry.After drying, apply it with water-resistant paper dipped in soapy water to smooth its surface; 6. After wiping with water-resistant paper, wipe it out with a mixture to make it bright, and then wax it.