At what level of aging cracks should tires be replaced?
2 Answers
Tires with cracks need to be replaced under the following circumstances: 1. Crack length exceeds 6mm: The tire requires replacement as damage to internal materials cannot be repaired. If the repaired tire is a front wheel, it's recommended to swap it with an unrepaired rear wheel to minimize the risk of blowouts. In remote areas where repair shops are unavailable, switching to a spare tire when cracks appear is the safest option. 2. Numerous small cracks: If the tire shows signs of aging with countless small cracks at the tread groove base or sidewall that are about to reach the carcass, immediate replacement is necessary regardless of the tire's age or wear level.
When tire aging cracks appear, the replacement standard mainly depends on the crack depth and location. If the crack depth exceeds 2 millimeters or appears in critical areas like the sidewall, it must be replaced immediately. These cracks weaken the tire and significantly increase the risk of blowouts at high speeds, which is extremely dangerous. Even if they're just superficial small cracks, if they're long or cover multiple areas, it's advisable to address them promptly. I had a neighbor who ignored tire cracks and ended up in an accident while driving on the highway during rain—a sobering lesson. You can perform a simple check before parking by inserting a coin into the crack to measure; if the coin's edge is completely buried, head to the repair shop for new tires immediately. Safe driving starts with tire health—never gamble with safety. Remember, tire aging issues shouldn't be overlooked. Checking tire pressure and crack conditions every six months can prevent accidents.
