What is a wear indicator used for?

The wear indicator is specifically designed to help drivers assess the tread depth of their tires. As tires wear down through regular use, the tread depth decreases, which can adversely affect traction, handling, and overall safety. The wear indicators are small, raised areas between the tread grooves that become visible as the tire wears down. When the tread wears down to the level of these indicators, it serves as a clear sign that it's time to replace the tire due to insufficient depth for safe operation.

While measuring air pressure and indicating tire temperature are important aspects of tire maintenance, they are not functions of the wear indicator. Instead, the primary purpose of the wear indicator is to provide a straightforward visual cue regarding tread life, making it easier for drivers to ensure that their tires are safe for driving conditions.