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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 .

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.

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 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.

1. Select a suitable cleaning agent. Household cleaners and common detergents on the market are more alkaline or acidic and more corrosive to the wheel surface. To avoid contact with strong chemicals, choose neutral soapy water to wash your wheels. 2. Do not wash the wheels when the temperature is too high. When the temperature of the wheel rim is high, please do not directly wash it with cold water. Please wait until cool before washing. Otherwise, the alloy wheels will be damaged and the brake disc may be deformed. affect the braking effect. In addition, washing the aluminum alloy wheel with washing powder at high temperature will cause a chemical reaction on the surface of the wheel, lose its luster, and affect the appearance of the wheel. When cleaning aluminum wheels, use a sponge or towel. Please don't use too hard wool brush. Using a steel wool to remove stubborn stains can damage the surface of the wheel. 3. Clean the rim properly. If there are hard-to-remove stains on the surface of the wheel rim, a professional cleaner should be used to remove the stains gently and effectively to reduce the damage to the surface of the aluminum alloy. When the car has been used for a certain period of time, when a hard, dark brown coke layer forms on the wheels, a cleaner is needed. If the rim is soiled with hard-to-remove tar that general cleaners won't do, use a brush to remove it. However, please do not use too hard brushes, especially iron brushes. It is easy to damage therim surface. The car is in a wet or near coast. To prevent the aluminum surface from being corroded by salt, the wheels need to be washed frequently. After washing as needed, apply wax to the rim to keep it shiny. 4. Develop good driving habits. Car owners should pay attention to lower road obstacles in daily driving, and do not park too close to the roadbed. In this way, the rim is easily damaged, and the appearance and rust of therim are also prone to occur. Removal of waterproof coatings that affect waterproofing and corrosion resistance. This will deform therim and affect driving safety.

1. Heat dissipation requirements: If the car runs for a long time, it will make the car wheel very hot. What’s more, the braking system will also generate a lot of heat. If this heat is not released in time, it will bring a big problem to the driving safety of the car and may cause the tire to burst. The hollow design can increase the contact area between therim spokes and the air, which is conducive to heat dissipation. 2. Reduce the weight of the car rim: As we all know, the lighter the mass under the spring, the better the car performance, the higher the acceleration and braking, and the higher the fuel efficiency. The hollow design greatly reduces the weight of the rim, and the aluminum alloy also provides enough strength for the spokes to support the rim. 3. Material saving: The hollow design saves the aluminum alloy material used in the manufacture of the wheel rim, reduces the production cost of the automobile wheel rim manufacturer , and also reduces the purchase price of the consumer. 4. More beautiful: At present, car manufacturers are paying more and more attention to the design of the wheel rim. A good car wheel design can improve the integrity of the car's design and play a finishing touch. Hollowed spokes can be made in various shapes to meet the needs of different consumers.

An alloy wheel is an automobile wheel that is made of alloys of aluminum or magnesium. Getting a good run via cars and motorcycles, this segment has seen a sudden spurt in demand in the recent years. As magnesium was used earlier for making an alloy wheel, these wheels were often termed as mag wheels (MAG for magnesium). As compared to traditional steel wheels, This type wheel has the advantage of lightness. As in, for the same strength as compared to a traditional wheel, these wheel will be considerably lighter. In addition, these wheels come with an aesthetically attractive appearance and even provide better heat conduction. Lighter wheels can improve the overall performance in a variety of ways. As it will directly contribute towards reduction in the overall mass of the vehicle, the fuel consumption will definitely reduce. It also affects the suspension part and better heat conduction helps to disperse heat from the braking system; this manages to improve the braking performance, more so in demanding driving conditions where brake failure because of over heating can occur. alloy wheels also carry a problem of electrochemical or galvanic corrosion and in due course of the time, the tyres could leak air (if there are no preventive measures taken). Also, unlike the traditional steel wheels, it is kind of difficult to repair wheels in the event of bends or other damages. Now coming to the commercial aspects, this type of wheels do cost more than its steel counterparts. It is this commercial aspect that doesn't allow some automobile manufacturers to provide alloy wheels as standard equipment (mostly pitched in as add-ons for a better price). Some manufacturers offer a latest addition called as the - locking wheel nuts. Special keys are required to remove the wheels fitted with these nuts, and in a way it counters the problem of these wheels getting burgled (mostly the case with expensive sports editions which are fit with expensive wheels). Unlike what is perceived, not only cars and motorcycles, even trucks get fitted with these as the small advantages like better braking and better heat conduction get magnified in the running of heavy vehicles. Processes Used for Manufacture of Alloy Wheels It is actually the rim and the wheel. Most alloy wheel rims are manufactured via a combination of aluminum, carbon and some other alloys. In terms of modes used to manufacture the wheels, there are 2 processes which are used; first being the casting method and the second is the forging method. In terms of casting, 3 methods can be used which are as follows · Low pressure die casting · High pressure die casting · Permanent mold and sand casting ( gravity casting )

1. Durable and safer Forged aluminum rings are 1-2 times stronger than cast aluminum rings and 4-5 times stronger than general iron rings, so they are stronger, have better toughness and fatigue resistance, and are safer. 2. Lightweight Forged wheels of the same size can be about 20% lighter in weight, and 1KG lighter on the wheel can increase 10 horsepower. In addition, the lightweight also significantly improves the response speed of the suspension, making it easier to deal with road potholes. Bump is greatly reduced 3. Fuel saving and good heat dissipation performance According to Japanese experiments, the weight of a 5-seater car is reduced by 1kg, which saves about 20L of gasoline a year. Forged wheels have better heat dissipation, high-speed driving, and tires are not easy to bulge and blow out. 4. Better handling performance Upgrading the forged wheels increases the width of the wheel without affecting the steering and loading, so that the acceleration, braking and sensitivity of the vehicle are significantly improved, and the car will obviously feel light underfoot. 5. More beautiful Because the forged wheel hub has a compact structure and can withstand high stress, it can design some relatively lively thin spokes in the shape design, and the design freedom is also high. Cars are more personalized.