Where can tread wear indicators be found on a tire?

Tread wear indicators, also known as tread wear bars or indicators, are specifically designed to show the level of tread wear on a tire. These indicators are typically located within the grooves of the tire tread itself, which allows them to be easily visible as the tread wears down. When the tread wears down to the level of these indicators, it signals to the driver that the tire has reached a point where it may need to be replaced for safety reasons.

This design serves a practical purpose, as it highlights the remaining tread depth in relation to the performance of the tire. Tread depth is critical for ensuring adequate traction, especially in wet or slippery conditions. By placing these indicators within the tread pattern, they allow for straightforward visual inspections that can guide users on the tire's condition without the need for special tools.

The other options do not accurately describe the locations of tread wear indicators, as they are not found on the sidewall, tire information label, or underneath the tire. The sidewall contains labeling and markings related to tire specifications but does not indicate tread wear; the tire information label usually provides details about tire specifications, pressure, and load capacity; and indicators are not located underneath the tire, where visibility would be significantly limited.