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The selection of wheels, how to choose the best one?Many people will transform the car at will in order to change the performance of the car. The transformation of the car requires professional knowledge. For the wheel rim, we cannot arbitrarily increase its diameter. 1. Don't blindly increase the wheels.Some people increase the wheels to improve the performance of the car. When the outer diameter of the tires remains the same, the large wheels are bound to match the wide and flat tires. The lateral swing of the car is reduced, and the stability is improved. When cornering, it is like a dragonfly, passing lightly.However, the flatter the tire, the thinner its thickness, the worse the shock absorption performance, and greater sacrifices must be made in terms of comfort.In addition, if there are a few roadblocks such as stones, the tires can easily be damaged.Therefore, the cost of blindly increasing the wheel rim cannot be ignored.Generally speaking, it is most appropriate to increase one or two sizes according to the size of the original wheel rim . 2. This means that when choosing, you can't choose your favorite shape as you want, and you have to follow the advice of professionals to consider whether the three distances are appropriate. 3. The wheels with complex structure and dense density are indeed beautiful and appear to be of high grade, but it is easy to be refused to wash or overcharged when washing the car because it is too troublesome to wash.The simple wheels are full of movement and clean.Nowadays, the aluminum alloy wheels that are deeply popular with the people, compared with the iron-cast wheels in the past, the degree of deformation resistance has been greatly improved, the weight has been greatly reduced, the power loss of the car is small, it runs fast, saves fuel and has good heat dissipation. It is loved by the majority of car owners.Here is a reminder that in order to cater to the tastes of car owners, many car dealers replace iron wheels with aluminum alloy wheels before selling cars, but they add a lot to the price.So from the perspective of affordability, don't pay too much attention to the material of the wheels when buying a car. Anyway, you can change it according to your own style, and you can save a fortune in the price. Why not?

The closed forging process of the outer ring of automobile wheel rim includes cutting: the blank is made by sawing process, heating: the blank is heated to 1100~1400℃, upsetting: the blank is upsetting on the upsetting equipment to obtain a drum-shaped blank, pre-forging: The drum-shaped blank is made of pre-forged parts through the pre-forged die, precision forging: The pre-forged parts are made of forgings through precision forging dies and hot forging machines. The sawing process can better control the accuracy of the blank blank, reduce the burrs of the forgings, make the quality difference between the blank and the final forging smaller, and reduce the loss of raw materials. The forging process adopts a 2500-ton hot die forging press, which is formed by a cavity forging process. The weight difference between the blank and the forging is controlled within 0.3% during the blanking period, which controls the cutting accuracy, reduces the generation of burrs in the forging, and reduces the waste of raw materials. When designing the forging die, the upper die is designed as a punch, and the lower die extends to the periphery of the cavity, and the guide hole is designed.

The aluminum alloy wheels forged in our country use 6061 grade aluminum alloy (LD30). Compared with traditional steel wheels, they have 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 tensile strength of 350Mpa, yield strength of 320MPa, elongation of about 12%, a piece of 6061 aluminum alloy truck wheel finished product 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 the rim. 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 et value of the wheel rim is also called the et offset value, and the et value is the offset value, which is the offset.In fact, it refers to the degree of deviation between the rim installation interface and the centerline of the rim. If the et value is greater and becomes a negative value, then it proves that the rim installed on the body will deviate from the outside. So in other words, different et values will affect the wheel track, and the wheel track will affect the maneuverability of the car. And under normal circumstances, the smaller the value of et, the more the rim will protrude outside the wheel arch.And there are only three degrees of deviation between the interface of the rim installation and the centerline of the rim, one is positive, one is 0, and the other is negative.Among them, the direction to the outside is positive, but the direction to the inside of the rim is negative.And changing the rims will change the wheel track of the car, and the wheel track will affect the distance of the centerline. So in short, the et value is positive and negative. In most cases, the et value of a car is usually positive. Only a few vehicle models or four-wheel drive vehicles will use negative values. Only off-road vehicles will be installed in the process of use. Copied other vehicles usually install upright wheels.For example, the offset of most vehicles should be et40. If the value is replaced with et45 or et50, then in terms of visual effects, the rim will be easier to enter the wheel arch than the original rim. Therefore, if you replace it with a rim that is less than the et40 offset value, the visual effect will look more outward than the original rim. This is because the et value is negative, so it can be seen from the visual effect that the rim looks like it is mounted outside the body.

The rim is the support inside the tire.The tire itself is very soft.The internal contour of the tire supports the barrel shape of the tire.The parts mounted on the shaft are called rims. ”Multi-layer environmental protection ion technology" electroplating wheels use powder spraying technology and magnetic control vacuum coating technology.Production technology has replaced the traditional high-pollution, high-cost, zero-pollution, and efficient production model, creating high value-added, advanced product technology, beautiful and luxurious, green and environmentally friendly, and superior performance. It has been widely recognized by the domestic and foreign markets. Once the electroplated wheel rim is scratched, the cost of replacing the entire wheel rim is relatively high and cannot be repaired and refurbished. Generally, some of the original wheels have a painted surface, some have a brushed surface, some have a polished surface, some are imitated electroplating, and some are electroplated wheels. Then, whether it is painting, drawing, polishing, imitation electroplating, wheel maintenance and electroplating maintenance, experts can change to electroplating wheels.If the surface is electroplated wheels, it can be electroplated for a long time. If our wheel rim itself has corrosion, clearance, deformation, etc., can we still perform electroplating? It's completely possible. The electroplating of the wheel rim is to repair the wheel rim and then perform electroplating to ensure the quality and effect of the wheel rim electroplating.

Some people increase the wheel rim in order to improve the performance of the car. In the case of the same tire diameter, the large wheel rim should be matched with the wide tire. The lateral swing of the car is small and the stability is improved, but the flatter the tire, the thinner its thickness, the worse the shock absorption performance, and the greater the sacrifice of comfort. The complex structure and dense wheels are really beautiful and look very high-grade, but it is easy to refuse to wash or overcharge when washing the car, because it is too troublesome to wash the car, and the simple wheels are dynamic, clean and tidy. Compared with the previous cast iron wheels, the popular aluminum alloy wheels have greatly improved deformation resistance, greatly reduced weight, small power loss in the car, fast running speed, and good fuel-saving and heat dissipation. They are loved by the majority of car owners. As a reminder, many car dealers choose to use aluminum alloy wheels to cater to the tastes of car owners. They can be changed according to their own style, and the styling styles of the wheels are also diverse for consumers to choose from.

Because aluminum alloy wheels have the following four characteristics, many cars currently use aluminum alloy wheels： 1.Driving comfort has been improved. Because aluminum alloy wheels have the metal characteristics of absorbing vibration and rebound, they have high dimensional accuracy after being processed by CNC machine tools.It's really round.Partial swing and small beating.The balance is very good, which can make the car very smooth and comfortable. 2.Fuel-saving and normal driving. Due to the light weight of the aluminum wheels, the rotational inertia of the four wheels is reduced after replacement, the acceleration of the car is increased, the braking energy demand is reduced, and the fuel consumption is reduced. 3. Improve driving safety. The heat dissipation coefficient of aluminum alloy wheels is three times that of ordinary steel wheels.At the same time, combined with the structural characteristics of aluminum alloy wheels, when driving for a long time, the heat generated by the tires and braking system is discharged into the air to maintain the appropriate temperature. 4.The beauty of the whole vehicle is improved. The exterior design of the aluminum wheels is very exquisite.The shapes are diverse, and the integration of the wheels can also be realized to show its beauty and enhance the beauty of the vehicle.

As the heavyweight component of a car, the wheel rim of a car is also very important for maintenance. If there is no proper maintenance, the car will have certain safety risks. If it is slightly smaller, it may cause the car to stop on the road and fail to start. If it is serious, it may also be dangerous.Therefore, maintenance is a very important thing. The maintenance method is mainly based on the following points, and the following points can be done to eliminate at least 95% of the hazards of the wheels. 1.The repaired wheels are comparable in quality and appearance to the new wheels.In order to maintain the wheels, wheel repair experts said that vehicles should try to travel on flat roads, such as expressways or flat urban roads.Try not to drive in places with bad road conditions, such as rocky country roads, rugged mountain roads, etc.If the road conditions are not good, you must slow down.These roads with bad road conditions are common situations where wheels are severely damaged. 2. Gently scrub.When washing the car, scrub as gently as possible.Do not touch the surface of the wheel rim with hard objects to avoid scratching the surface of the wheel rim.If it is a painted wheel rim, once the cleaning tool is good, it may leave small traces on the surface, so try to scrub with a soft cleaning tool.

There are many kinds of wheels according to the diameter, and there are also many kinds according to the width.Then, many models can be divided into different diameters, different widths, and different materials.Some car owners think that the original tires are not advanced enough and want to upgrade. They often widen, reduce the flat ratio, increase the diameter, and change the material. At this time, if you have to change the wheels, it is called a modified wheel. 1. What types of wheels are there? According to the surface treatment process of the wheel rim , different methods will be adopted, which can be roughly divided into two types: paint and electroplating. 1. Painted wheels are moderately priced and durable. The wheels of ordinary models are less considered in appearance, and good heat dissipation is a basic requirement. The process basically adopts paint treatment, that is, first spraying and then electric baking. The cost is relatively economical, the color is beautiful, and the retention time is long. Even if the vehicle is scrapped, the color of the wheels remains the same. The surface treatment technology of the wheels of many large-scale models is paint, and some fashion-forward and dynamic color wheels also use paint technology.Such wheels are moderately priced and have complete specifications. 2. The price difference between electroplated wheels is large. Electroplating wheels are divided into silver plating, electroplating and pure electroplating.Although the color of electroplated silver and electroplated wheels is bright and vivid, the retention time is short, so the price is relatively cheap, and it is liked by many young people who pursue freshness. Pure electroplated wheels, the color is maintained for a long time, which can be said to be of high quality and high price.Some high-end cars will be equipped with pure electroplated wheels as standard in the original factory. Wheels can be divided into two categories according to the material: steel wheels and alloy wheels. 3. The most important advantage of steel wheels is that the manufacturing process is simple, the cost is relatively low, and the ability to resist metal fatigue is very strong, which is what we commonly call cheap and strong.However, the disadvantages of steel wheels are relatively prominent, that is, the appearance is not beautiful enough, the weight is large, the inertial resistance is large, the heat dissipation is relatively poor, and it is very easy to rust. 4. Alloy wheels have light weight, low inertial resistance, high production accuracy, small deformation and low inertial resistance when rotating at high speed, which is conducive to improving the straight-line driving performance of the car and reducing the rolling resistance of the tires, thereby reducing fuel consumption. The thermal conductivity of the alloy material is about three times that of steel, and the heat dissipation is good. It can play a certain role in the thermal attenuation of the vehicle's brake system, tires and brake system. At present, the alloy wheels of original cars on the market are mainly aluminum alloy. Of course, many modified wheels will choose chromium, titanium and other elements as basic materials in order to meet certain special requirements and visual improvement. However, compared with steel wheels, the price of alloy wheels is much more expensive, so often in many low-end original cars, steel wheels will appear on low-end models, while alloy wheels are standard for high-end models.

The structure of the automobile rim is simple and can be divided into two parts: 1.Spokes 2.rims.To be precise, the spokes of almost all automobile wheels are currently hollow. The main reasons why they are all hollow designs are： 1.Heat dissipation requirements: If the car is driving for a long time, it will make the wheels of the car very hot; in addition, the braking system will generate a lot of heat.If these heat cannot be released in time, it will cause a big problem for the driving safety of the car and may cause the tires to burst.The hollow design increases the contact area between the spokes of the rim and the air, which is conducive to heat dissipation. 2.Reduce the weight of automobile wheels : As we all know, the lighter the mass under the spring, the better the performance of the automobile, the higher the acceleration and braking, and the higher the fuel efficiency.The hollow design greatly reduces the weight of the wheel rim, and the aluminum alloy also provides sufficient strength for the spokes to support the rim. 3.Material savings: Of course, the hollow design saves the aluminum alloy materials used in wheel rim manufacturing, reduces the production cost of automobile wheel manufacturers, naturally reduces the cost of host manufacturers, and consumers also enjoy the benefits.Below is a pile of aluminum rods.It's all money. 4.More beautiful: Now that Internet celebrities have seen the level of appearance, the wheels are the same.At present, automobile manufacturers are also paying more and more attention to the axle shape design of the wheel rim. Good automobile wheel design can improve the integrity of the automobile shape design and play the role of finishing touch.Hollow spokes can be made in various shapes to meet the needs of different consumers.

Sports car tires are thinner because they can have a stronger grip. When the power output of the vehicle increases, the grip also needs to increase, otherwise it is difficult to cope with the output torque.If you want the grip of the tire to become stronger, you can widen the tire, but this will increase the fuel consumption of the vehicle. Sports car tires generally do not use a way to widen the tires to enhance grip. It is to make the diameter of the rims larger and the length of the rim banners longer, so that the rubber raw materials needed on the tires will become less, the thickness of the tires will become thinner, and the engine power will have more room for improvement, so that the speed of the vehicle can be increased. Sports car tires are relatively thin and are not suitable for household vehicles. Household vehicles are more pursuing quiet and comfortable performance, but if the tires are relatively thin, there will be greater tire noise when driving, and the ride comfort will be greatly reduced.Thin tires are generally suitable for vehicles with strong sports performance, so that the handling provided will be more stable, and when driving at high speed, it will have relatively good performance. Thin tires and low flatness have the same meaning. The lower the flatness of the tire, the stronger the handling. If the flatness of the tire is relatively low, then its sidewall will be relatively solid. When the vehicle is turning, the tire is not easy to deform. Tires with low flatness will have a greatly reduced shock absorption effect, so that comfort will plummet, so sports cars will have a loud roar when driving, and the overall performance on slippery roads is relatively poor. When driving a sports car on rainy days, pay extra attention to safety.

Because of thermal expansion and cold shrinkage, it is okay to keep the tire pressure of a car at 2.3 bar or even to 2.5 bar in winter, but the standard tire pressure specified by each car is different, so the specific requirements depend on the car's user manual, but the tire pressure in winter is 0.1 to 0.2 bar higher than the normal setting. The tire pressure of the car must be maintained within the prescribed standard range. If it is too high or too low, it may cause problems in the driving of the car. For example, the tire pressure is too high, which will reduce the adhesion of the car tires , feel the vibration of the steering wheel, and affect the drainage and service life of the car tires. If the tire pressure of the car is too low, the resistance during operation will increase, resulting in an increase in the fuel consumption of the car.It will also cause the car tires to become very soft and the friction will become greater. If we are driving at a fast speed, a flat tire may also occur, which will have a greater impact on the safety of the vehicle. What should I pay attention to when using tires in winter？ 1. First of all, we must check the car tires daily, because the temperature is relatively low, which may affect the hardness of the tires, causing the wear to be slightly more serious than in other seasons. Regular inspections can reduce the probability of accidents； 2. Because of icy roads and other conditions, there may be some ice ballast or stones stuck in the tire pattern. We must check in time, otherwise it may cause a flat tire； 3. We should pay attention to detecting the tire pressure of the car at any time. Once it is found to be too high or too low, we must take adjustment measures in time to avoid more serious situations.