Slow deflation generally occurs at the valve position, which will not have any effect during driving, except for fear of long-term parking. This kind of tire can be replaced by a valve or used as a spare tire, but the tire pressure should be checked frequently. Tire puncture, poor repair, aging of valve core and failure to reset valve core after checking air pressure will all lead to chronic air leakage. During inspection, it is recommended to inflate the tire to the maximum tire pressure of about 3.0bar, and then soak the tire in the sink for all-round inspection. It is recommended to repair it as soon as possible, even if it is flat at high speed. Of course, if it is flat at once, it will be in trouble. If it is slow, it is still possible to find a general vacuum tire as long as it is removed and filled with air. It takes a week to flatten out. Your car should be punctured. Go and mend the tire. Usually it's an air mouth, otherwise check for nails. @20 19