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TiresTire Tread Depth: The Legal Limit, the Coin Test, and When Driving Gets RiskyHow to measure tread depth without tools, the legal minimum vs real-world safety, and wet-road wear effects.TiresHow to Check Tire Tread Depth and When It Becomes DangerousThe penny and quarter tests, the 4/32 and 2/32 inch thresholds, and how wear patterns reveal alignment and pressure faults.TiresTire Age Cracking: Why Replace Them Even With Great Tread Left?How tire rubber degrades over time even without use, and why age can matter more than tread depth.