What allows a tire to maintain adequate air pressure?

A properly sealed rim and tire beads are essential for maintaining adequate air pressure within a tire. The tire beads are the edges of the tire that sit against the rim, creating a seal that prevents air from escaping. When a tire is mounted on a rim, it's crucial that this connection is airtight. A poor seal can lead to air leaks, resulting in a loss of tire pressure over time.

In addition to tire beads, the design and condition of the rim play a significant role in ensuring that the tire maintains its air pressure. If there is a gap or imperfection in the sealing surfaces, air can gradually escape, leading to deflation. Therefore, ensuring that the tire is properly mounted and sealed is a critical factor for maintaining optimal tire pressure, which ultimately affects vehicle safety, handling, and fuel efficiency.

Other options, while related to tire maintenance, do not directly influence the ability of a tire to hold air pressure in the same fundamental way.