Does a slightly scratched tire need to be replaced if the cords are not exposed?
3 Answers
If the tire's cord layer is damaged, it must be replaced. If the cord layer is not damaged, it can continue to be used. Here is some related additional information: 1. Cord layer: According to the tire's structure, the sidewall is the weakest part, consisting only of a thin rubber layer and the cord layer. The cord layer is a mesh layer woven from cotton threads and rayon. Despite being so thin, the tire sidewall bears the air pressure that supports the entire vehicle's weight. If the sidewall is cut, especially if the cord layer is damaged, it completely disrupts the structural stress of the sidewall, making it highly prone to causing a tire blowout. 2. Daily tire maintenance: Check the tire pressure before driving, replace tires when they reach a certain age, and regularly inspect the tires for any foreign objects.
I've been driving for over twenty years and have encountered many minor tire scratches that don't expose the cords. Generally, if it's just surface abrasions on the tire shoulder or tread area without damaging the internal structure, the tire can still be used for a while. The key is the location of the scratch—the sidewall is the most dangerous as it's very thin, and a high-speed blowout could have serious consequences. I recommend first checking the depth yourself by inserting a one-yuan coin into the scratch—if the scratch is deeper than the edge of the coin, you should be cautious. Monitor tire pressure regularly, and if there's any abnormal bulging, replace the tire immediately. Don't gamble with safety—tires don't cost much, but the losses from an accident could be far greater. The safest approach is to have a reliable repair shop evaluate the tire—don't rely on gut feelings.
When encountering small scratches on tires without exposed steel wires, a professional inspection is essential. Sidewall scratches are particularly dangerous—even without visible cords, they can weaken the tire structure. Use a depth gauge to measure the scratch depth—if it exceeds 3mm, consider replacement. Don’t compromise on safety, especially for frequent highway driving or heavy loads. Monitor tire pressure diligently and address any signs of bulging or air leakage promptly. Cost-wise, replacing a single tire is affordable compared to major repairs. Visit a tire shop for a free inspection—they have professional tools for accurate assessment. Avoid delays, as accumulated risks can lead to severe consequences.
