Why Do Large Vehicles Tap Their Tires?

2 Answers
MacFinn
07/25/25 11:40am
Because when a vehicle is driven with a load, heat is generated during the process, causing changes in the tire pressure. Tapping it with a hammer is to determine whether it is within the normal range. Tire Introduction: Tires are rubber products, so even if they are not used, they will naturally age. Before using stock tires, it is necessary to check for cracks and rubber aging. Tire Storage: If stored in a suitable environment with constant temperature and away from light, the aging process of rubber will slow down significantly. Using them after a few years is not a problem. However, if stored in a place with direct sunlight and large temperature differences, the rubber will age and crack. Even if they have never been used, they are unsuitable for use because the rubber loses its elasticity and cannot provide the necessary grip.
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VanJoy
08/11/25 8:05pm
Having driven for over 20 years, I've developed a habit of tapping my tires before every trip. It may seem simple but it's actually quite useful—mainly to judge tire condition by sound. If the tap produces a crisp, clear sound, it means the pressure is sufficient and all's well; if it sounds dull, chances are the tire is flat. Underinflated tires on heavy vehicles are particularly dangerous as they're prone to blowouts under heavy loads. This method also helps check for loose bolts or cracked rims. Just last month, I discovered a nail in one tire thanks to this technique—ignoring it would've definitely caused trouble on a long drive. Many young drivers today rely solely on tire pressure monitors, but mechanical devices can fail. Tapping them yourself is the most reliable method.
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