Everyone who understands cars changes to 17 inch wheel rims? This statement obviously cannot stand scrutiny. It can only be said that 17 inch wheel rims are relatively balanced for family cars, taking into account comfort, appearance, fuel consumption, and practicality, so this is a question of trade-offs, not the so-called so-called Knowing the car, I believe that every car lover has a set of big wheels in his heart. Beautiful is the biggest advantage. Who doesn't like it?

Isn't it bad for wheels over 19 inches and low aspect ratio tires? In fact, there is no specific concept of understanding the car. Everyone is just standing on their own and negating the opinions of others! For example, taking durability as the core point of view, 18 inch, 19 inch, and 20 inch wheel rims have a much higher probability of bulging tires than 17 inch wheel rims, and large wheels are more likely to be scratched. Indeed, larger wheels and low profile ratio tires It is not durable in terms of durability!

But based on this, there is no way to explain that you don¡¯t understand cars, because the consumption and affordability of different consumers are completely different; similarly, car friends from the perspective of performance will feel that small wheels are equipped with high flat ratios. Tires seriously affect cornering stability and restrict vehicle performance; therefore, it is better to talk about trade-offs and angles than whether you understand the car or not. If you buy a car just for transportation and don¡¯t want to spend more money on maintenance, then 17 inch wheel rims are sufficient. Come on!

Advantages and disadvantages of large wheels with low-profile tires

What are the advantages of large wheels with low-profile tires? Of course it is the value of the face. After all, the performance advantage is not appreciated by ordinary drivers; how big wheels are considered big? In my cognition, 19 inch wheel rims are the starting point, that is to say, if you want to reflect the appearance, 19-inch wheels are the starting point; for the vast majority of ordinary riders, the appearance is the only meaning of the existence of big wheels, vigorous driving, Performance and the like are all clouds for ordinary riders. If the car is not pulled to the limit, it is really not easy to show the difference!

Large wheels are often equipped with low aspect ratio tires (with thick tires, there is no sufficient space), and the so-called low aspect ratio tires are actually tires with thin sidewalls, as shown above (the aspect ratio is the sidewall/tyre width) ; Low-profile tires have stronger sidewall rigidity (short sidewalls are not easy to deform), which means that low-profile tires provide more support during high-speed driving; however, the disadvantages are also extremely obvious, and the sidewall rigidity is sufficient. It does provide stronger support, but it is not ideal in terms of cushioning (bump, relatively speaking)!

Secondly, the tire cross-section and driving surface are wider, which will increase fuel consumption. Another point is that the drainage capacity is reduced, and the gripping ability may be reduced in heavy rain (of course, this refers to the extreme state, normal driving, this kind of performance quietly changes The difference is hard to feel); the use of more materials and the increase in scrap rate increase the cost, so low-profile tires are not cheaper; of course, for ordinary riders, low-profile tires are too easy to bulge, I have seen A Q50L top-fitting rider has tires bulging twice a year (19-inch wheels), and changing 19-inch tires twice a year is also very expensive!

Reasonable selection of wheels according to actual power
Not all cars are suitable for large wheels. Larger wheels have requirements for engine power. Increased wheels will increase weight (not counting the cost and weight loss is another matter), the moment of inertia required for acceleration increases, so the engine needs to release more To start and speed up, simply speaking, it means that the start becomes fleshy; and the brakes become more strenuous. This is the same as the principle of the heavy-weight flywheel. Once the heavier tires are turned, the kinetic energy is stored more, so the braking is laborious!

Generally speaking, increasing the wheel hub and reducing the aspect ratio of the tire will not lead to an increase in the outer diameter of the tire (note that the tire diameter), but once the outer diameter of the tire increases (if the tire is not bared), it will inevitably lead to a loss of part of the torque; also That is to say, the power of the car is not good, once the tires increase (outer diameter), then the power will be damaged! Output torque = force * arm = wheel traction force * tire radius, the output torque remains unchanged. If the tire radius increases, the traction force F will be reduced, and the traction force F=ma. The reduction of the traction force will cause the acceleration a to decrease, so the car with poor power is the most Don't use big wheels!

The above is the description of the advantages and disadvantages of large and small wheels. It can be said that the so-called small wheels of 17 inches (and below) and large wheels of 18 inches (and above) have their own advantages. Choosing 17 inch wheel rims is very reasonable for family cars. The five dimensions of value, comfort, power, fuel consumption, and durability are a very balanced choice, but this is only a trade-off, and it is not a matter of understanding the car. After all, some car users have sufficient power and financial resources for performance. Isn¡¯t it reasonable to choose a bigger wheel? It¡¯s worth complaining about driving an a-class car with tight power, but using a 19-inch tire; for the sake of low-cost, poor-brand cast iron wheels, the weight and tire diameter are greatly increased, the power is greatly reduced, and fuel consumption is also increased. It's a bit unwise to plant!