What is the classification of a tire with a leak that can be felt or heard?

A tire with a leak that can be felt or heard is classified as a major issue because it indicates a significant loss of air pressure that can affect the tire's performance and safety. A major leak suggests that the tire may not be able to maintain adequate pressure while in use, which can lead to handling problems, reduced traction, and increased wear on the tire.

In contrast, a minor leak would not typically be noticeable either audibly or through a change in feel, and moderate leaks might show some signs but would not be as severe or immediate as a major leak. A critical classification would imply a more urgent threat to safety, such as a blowout or complete failure, which is not the case with a leak that is merely felt or heard. Hence, categorizing this type of leak as major aligns with the potential risk it poses while driving.