In the post bar, I saw that many C-series cars riding big G are often troubled by flat tires ... To sum up, most of the reasons are tire pads. Of course, you added your own tire pads. Generally, the puncture situation of C 1C2C3 tire pad will be greatly improved. If the rear wheel deflates repeatedly after replacing the tire pad ... it can only be said that it is a bit unlucky ... Also, it is normal for a road car to have a flat tire after repairing the tire, because the ordinary tire patch can't resist the tire pressure of 100+psi. The safest thing after a flat tire is to change the inner tube and check whether there is glass slag inside the outer tire. If there is still unprovoked deflation, you can try to remove the tire pad and polish the wheelset with fine sandpaper. This is more effective. As for the tire problem, the original tires of most cars are not strong ~ ~ If you want to replace them, you can consider the GP4000S made by Marvin, and the tires of Michelin's L2, PRO3 and PRO4 are all ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ PS: You must learn to drip when repairing tires.