Under what circumstances can tires be covered by the three-guarantee policy?

[OColton]

Tire quality three-guarantee coverage can be divided into tread, shoulder, and sidewall. The following are specific introductions to situations where tires can be covered by the three-guarantee policy: 1. Tread: During production, if the tread is too long, not compacted, the tread brushing is uneven, poor adhesion with the carcass leading to pressure loss, or if there is a rollover, as well as cases where the crown steel belt layer is exposed. 2. Shoulder: Separation between the shoulder rubber and rubber, or between rubber and cord layers, but without obvious bulging, with a smooth surface at the separation point and no tearing, or cases where rubber and cord layers form obvious bulges resulting in shoulder bubbles. 3. Sidewall: Separation between the sidewall rubber and cord layers forming side voids or side bubbles, with a smooth surface at the separation point.