The phenomenon of a dark, linear mark appearing on a tire after driving with low pressure, often referred to as a “flat tire mark,” results from excessive friction between the deflated tire’s sidewall and the road surface. This friction generates heat, causing the rubber compounds in the tire’s sidewall to degrade and leave a visible discoloration. A similar mark might appear if a vehicle is driven with a dragging brake component, though the pattern and location will likely differ. The severity of the mark depends on the distance driven, the tire’s construction, and the road surface.
Identifying this type of marking can be crucial for diagnosing tire and vehicle issues. It provides a visual indicator of a prior deflation event, which might otherwise go unnoticed, especially in cases of slow leaks. This information helps in determining the root cause of the flat, whether it’s a puncture, valve failure, or other damage. Understanding the underlying cause allows for preventative measures to be taken, potentially avoiding future incidents and ensuring vehicle safety. Historically, recognizing these marks has been an essential part of vehicle maintenance and inspection.
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