How to unload the spare tire after Baojun 730?

We often say that "born in sorrow, died in happiness", and this sentence is more appropriate to describe Baojun 730. Before, four apprentices drove Baojun 730, stepping on various dangerous roads in Tibet, and all four tires were very strong.

Because Baojun 730 changed hands from time to time, it is difficult to pursue the murderer (for the sake of preserving our sanity, it means that he is by no means himself). After bulging, we found a detail, that is, Baojun 730 spare tire is full-size, and the specifications are exactly the same as those of the tire, except that there is no aluminum alloy tire, which is covered on the steel ring. By the way, popularize the common sense of "inflation" here. When the ply cracks somewhere inside the tire, the ply will form a "bulge" because it won't stick in.

The reason for the bulge is generally to run through a big pit at high speed or to rush to the curb in a more violent way. After the bulge occurs, the tire pressure may not be abnormal, and there is nothing abnormal when the vehicle is driving. But because the curtain has cracked, the risk of puncture will increase at this time. Therefore, when you find a bulging tire, you should try to replace it as soon as possible, especially to avoid driving at high speed. In addition, bulging is an irreparable injury, and the only way to deal with it is to replace the tire directly.

To be on the safe side, I'm going to change the spare tire first After opening the trunk, I immediately gave up the idea of changing tires, because the trunk was full of things moved by my colleague Yanko (the spare tire under the car had to be operated in the trunk), so I had to park the car back in the garage and not use it for the time being. Remind the owner of Baojun 730 that the tire changing tool of this car can only be found by uncovering the hidden compartment on the right side of the trunk, instead of being placed at the bottom of the front seat like Hong Guang S. It took us some time to find it.

I drove another car to the auto parts city to buy new tires, and checked the price online in advance. Tong Jia Comfort 228 with 195/55 R 16 probably needs 270 yuan. However, after visiting the Auto Parts City, I found that the price was basically unattainable. Some shops "dared" to drive to 480 yuan (maybe they saw me driving in a Lexus NX and thought they were going to intercept me), and some were basically above 350 yuan, and they also assumed a righteous posture. In order to avoid delaying the use of the car, I finally decided to buy it in a physical store, and finally chose a store with a relatively reliable price. I also want to quote 320 yuan.

After putting on new tires, I thought the story was over, but it didn't. After changing the tire, the deviation of the car becomes quite serious during the process of violent acceleration and deceleration. Especially when climbing up from the parking lot and stepping on the gas pedal, a "Machamp" pulled the car to the right and turned the steering wheel to the left for almost 30 degrees to straighten the handlebar. In addition, in the process of braking hard, such obvious deviation will also occur. Because of the safety problems behind it, we immediately embarked on the road of "seeking medical advice".

We found a tire shop that our colleague A Zhuo is familiar with. After some "listening", the boss roughly found the crux of the problem, that is, the tire pressure of the new tire is on the high side, reaching 2.5bar, while the other three tires are all 2.3bar. 2.5bar itself is not particularly high, but the diameters of the left and right front wheels are different, so there is a "Machamp" when accelerating and decelerating. In addition, the boss also conveniently gave us a tire dynamic balance. After a course of treatment, the problem of acceleration and deceleration deviation has been solved. Therefore, after the owner changes the tire, he must pay attention to the uniformity of tire pressure, especially the two front wheels that shoulder the steering task.

In fact, before the tire change, our Baojun 730 had a deviation problem. However, compared with the previous "Machamp", this kind of running is much milder, that is, when the direction of the straight road is released, the car will slowly turn to the right. On the forum, we can see some car owners complaining about the deviation of Baojun 730, but there is no specific description, so I don't know if it belongs to the same situation as us. After replacing a new tire, this deviation is slightly worse than before, which may be related to the different tread depths on the left and right sides.

It happened that Baojun 730 was going to the 4S shop to make three guarantees, so we gave the question back to the master. Master changed a slant tire for us first. Both front wheels have become old tires, and new tires have come to the rear wheels. However, in order to eradicate the old problem of 730 deviation, we should consider re-brushing the electronic steering program that the 4S shop gave us. In short, after coming out of the 4S shop, the problem of Baojun 730' s deviation has been solved.