During tyre and wheel checks, which option describes tyre wear that indicates replacement is needed?

• A. Air pressure
• B. Tyre wear is even or uneven
• C. Tyre worn down below wear indicator
• D. Chunks missing from the rubber tyres

Answer: (C)

When checking tyres for safe operation, look for the wear indicators that are built into the tread. These indicators show the minimum safe tread depth. If the tyre is worn down below those indicators, it means there isn’t enough tread left to safely support loads or provide adequate traction, so the tyre must be replaced.

Air pressure matters for performance and wear patterns, but it doesn’t itself tell you that a tyre has reached the end of its usable life. Noting whether wear is even or uneven helps identify issues with alignment or loading, yet it doesn’t specify a replacement decision unless the depth falls below the wear indicators. And visible damage like chunks missing from the rubber is a serious issue too, but the clearest, standard signal that replacement is required due to wear is tread depth below the wear indicator.