How severe must a sidewall cut be before replacement is necessary?

[KarterLee]

Tire sidewall cuts exceeding 4mm in depth require immediate replacement. Below are key considerations regarding tire damage: 1. The rubber thickness on tire sidewalls typically doesn't exceed 1cm. Any damage to this area has high probability of reaching the radial ply layer. Once the radial ply is compromised, the tire's structural integrity cannot be guaranteed, creating imminent risk of blowout. 2. The absolute maximum allowable sidewall cut depth should not exceed 4mm. Even a visually noticeable cut may already surpass this limit. Immediate replacement is crucial to prevent potential blowouts. 3. If a tire cut is visible to the naked eye, the damage is already significant enough to potentially compromise the tire's structural integrity.