As a worn product, tires must be replaced frequently in the long years of car use. When it comes to changing tires, many people may wonder, should I continue to use the tires of the same brand, model and specification of the original car, or should I follow the recommendation of the maintenance technician and change them at will?
Just recently, Ethan's family has landed for nearly four years and traveled nearly 55,000 kilometers? Nissan Sylphy tire has reached the point of "no need to replace", so today we will take this model with the highest monthly sales volume in China as an example to discuss the knowledge of tire upgrading.
First of all, let's talk about the basic information of this car: 20 16 Zhixiang version (the second top match). I chose this unpopular color because I was afraid that if I bought white and black, I wouldn't find my own car in the parking lot, because there are too many cars in Guangdong ... Anyway, as a brand that has always been "notorious" in terms of cost saving, this car is now. Yokohama E70R silent energy-saving tire with R 16.
To tell the truth, there is nothing wrong with the tire itself. The problem lies in the size. Although the power of Sylphy is Buddhist, it is still a serious A-class car, and the tire width of 195mm is really unreasonable today. What's even more amazing is that 16 inch 195mm tire width is actually a relatively small model. I was dumbfounded when I started thinking about changing the tires. In addition to the original models, a few models of horse brands, and several domestic brands, this size basically can not buy high-end tires from other big brands. As a result, the problem of directly replacing tires with higher specifications has also been formally put on the agenda.
First of all, let's talk about science. When we talk about tires, we mainly talk about several data, namely, tread width, flatness, tire structure, diameter, load factor and speed level, as shown in the following figure.
The wider the tread, the better the grip. The lower the flatness, the lower the "thickness" of the tire side, and the smaller the lateral deformation of the tire when cornering, but the corresponding shock absorption will be worse, and the tire is more likely to bulge. Needless to say, as for the diameter, you must buy a tire that matches your rim diameter. As for the speed and load level, general household tires should not be too concerned, because this figure generally far exceeds the actual use scenario (for example, 92W means that the maximum load of a single tire is 690KG and the maximum speed is 270km/h). Of course, these two indicators can also reflect the technical content of tires to some extent.
If you only replace the car according to the size of the original car, it is enough to know the above points. The rest depends on the thickness of your wallet. After all, the prices of the same size, different brands and different series are worlds apart.
And if you are as "unwilling to be lonely" as me and want to upgrade the tire size, you should pay attention to three points.
1. Does the rim match the tire?
After all, the tire should be mounted on the rim, which does not mean that the tire of 16 inch can be mounted on the rim of 16 inch. You have to see if the width of the rim matches the width of the tire. Rim width is generally expressed by "J value", and J value is generally marked on the inside of the rim. Take Sylphy, which changed tires this time, for example, its original factory matching 16-inch rim J value is 6.5. You can choose195,205,265433 if you don't want to "go to war" (no money).
2. Will it interfere with other parts after installation?
Choosing a wider tire means that the tire occupies a larger volume in the fender. When the direction is exhausted, whether it will "rub" into the lining or other hanging parts is also something that everyone needs to pay attention to. Referring to the previous experience and "visual inspection method", even if a tire with a tire width of 2 15mm is replaced, Sylphy will not rub the tire.
3. Will it affect the accuracy of the original speedometer?
First of all, changing the tire size will inevitably affect the reading of the odometer, so the tire diameter must be taken into account when changing the size. The formula for calculating the tire diameter is: tire diameter =2×L (tire width )× V (flattening rate)/100+d (hub diameter )× 25.4, and the difference between the old and new tires is best controlled within 3%, otherwise it will be easy.
Based on the above, I decided to set the upgraded tire size to 2 15/55? R 16, so the tire diameter is 642.9mm, which is a perfect upgrade size, which is very small compared with the original factory (640.4mm). Then the next step is to determine what brand and model of tires to buy.
A badly worn old tire.
In fact, the reason why the original car tires grind so fast has a lot to do with my driving style. Although netizens complain that Nissan is a mobile roadblock every day, I always drive this car to rush out at the traffic lights first on the roundabout ramp, killing people at high speed, so the front wheel has been tortured like a tire. Coupled with the National Day holiday from Sanya, Guangzhou, a long-distance attack of nearly 2000km, it can be said that it is urgent to change tires.
I am more concerned about the wet braking performance and the comfort of the tire itself. Combined with the thickness of my wallet and my colleague Sun Sen's "flat tire Swift" before changing Goodyear tires, the response was also good. Finally, I set the goal of the new tire on Goodyear's escape series.
Because I learned that this model focuses on wetland control and comfort, which is exactly what I want. You should know that it is raining or typhoon in Guangzhou. Even on rare sunny days, sprinklers will run and sing in the street, so I pay great attention to the wet and slippery performance of tires.
Goodyear, a tire brand, has always been very persistent in safety, and I even think it is "Volvo in the Year of Tire". As early as 1934, Goodyear obtained the world's first patent for "flat tire" (commonly known as puncture tire), and officially popularized this kind of tire on a large scale in 2005, which can greatly reduce the death rate of high-speed puncture tire. At the same time, they have always been extremely stubborn about all kinds of "puncture-proof technology". For example, in 2009, Goodyear invented the non-pneumatic spring tire of the lunar rover. Following the cool concepts such as "spherical tire" and "power generation tire", this year, a non-pneumatic concept tire equipped with regenerative tread technology was announced, which was numerous at one time.
And their accomplishments in off-road tires are also very high. Many high-end off-road vehicles will use AT tires produced by Goodyear, which also proves that the quality of tires produced by Goodyear is reassuring.
Therefore, I have high expectations for these four new Goodyear tires. When I was waiting for the installation, I thought, after moving the tire, I'm afraid the next place to "move" is the following two places. ...........................................................................................................................
No contrast, no harm. When the old and new tires are put together, the main drain grooves of the old tires are not even as deep as the small grooves of the new tires. You might as well guess how long this brand-new escape can last under my violent driving. If I change the tire next time, I guess I'll just change the big rim and go directly to Goodyear's high-performance tire eagle F 1. ......
And my first feeling after I got a new tire was: it's too fucking quiet!
Goodyear Easy Ride is not the main silent tire, but the old tire is worn to a great noise, so the whole world is quiet after putting on the new tire. Another feeling is that when the wetland runs over a small puddle, I feel more confident and won't feel suddenly lighter. However, when I ran over a large puddle with poor drainage on the side of the road, the feeling of holding the steering wheel slowed down. It is really a tire that focuses on wetland management. ......
As for the limit braking distance? Seriously, I hope I don't have to go through this working state all my life ... but I believe that with such excellent wet grip and wider tread blessing, the braking distance of this tire will definitely make a qualitative leap.
Looking at the "security" of the new tire tread, I understand that the days when you can step on ABS with a little heavier brakes are gone forever. Alas, since the tire is no longer the short board of the brake, is it time to toss the brake system again?
After the tire width increased by 20mm, the performance of the car in cornering was obviously more stable. Does not exist! Of course, from the visual point of view, the whole wheel is more "full" than before, and even achieves the effect of "wrapping", but the pro-test will not rub the wheel arch in the case of directional killing.
Of course, although upgrading the tire size is a great thing, there are still a few points that need attention. First of all, if the tire width is upgraded like me, the power of the vehicle will be negatively affected, but the power of this car is originally a "vegetable" and has nothing to do with the tire. Blame it on Sylphy. It's the only car that meets my budget and car demand. ......
In addition, in addition to the power will become worse, the same direction will become heavier, but this is not a bad thing for this car that is originally the biggest short board. Most importantly, changing the tire size can't pass the strict annual review. Therefore, if the tire size of your original car is not as mainstream as mine, I suggest you buy a tire model that is more in line with your own needs while maintaining the specifications of your original car.
As for the long-term experience of this "grocery cart" and "king of Didi", I will share it with you in the future "editing story". There may be some "black material" and spit in it, but I can guarantee that every sentence is true. Curious friends remember to pay attention to our follow-up updates.
As for the license plate, I won't code it. Anyway, there are cars everywhere in the street ... you won't find me (laughs).
This article comes from car home, the author of the car manufacturer, and does not represent car home's position.