A bulge in the tread of the tire could indicate what?

• A. A broken belt in the tire
• B. A puncture
• C. A worn tread
• D. A manufacturing defect

Answer: (A)

A bulge in the tread signals internal tire damage, specifically a broken belt or belt separation. The belts under the tread provide strength and shape; when one of them is damaged, the tread area can bloat outward, creating a noticeable bulge. This indicates the tire is structurally compromised and at high risk of a blowout, so it should be replaced and not driven on.

A puncture causes air to escape through a hole, usually resulting in a flat or slow leak rather than a bulge. A worn tread shows reduced depth and uneven wear, not a protruding bulge. A manufacturing defect could cause various issues, but the most common and direct explanation for a bulge is internal belt damage.