What's the difference between wide tires and ordinary tires? What are the advantages and disadvantages of each?

Look at the size of ordinary tires. Do you know the light of Wuling van? The original tire is 155R 13. And 165/70R 13. \x0d\ The tires of this van are very narrow. If you walk fast, you will be unstable. If you move a little, it will swing. If you are not careful, it is easy to overturn. \x0d\ I have changed my van to 65438. Now running in 120 will not float. Very stable. The braking effect is also very good. Because there is good ground contact. But the fuel consumption is higher than before. It used to be 50 cents a kilometer. It's 70 cents now. Another disadvantage is that the direction is heavy when driving at low speed. You should hit the direction hard.