Tyre carcass is damaged or hurt due to the tyres because of impact or segment during the driving.

The outside cutting of the tyre is called cutting blasting,

The damage is caused by impact or cutting, and some were damaged, and now become worse during driving, causing the strength decreases rapidly.

Reason: Carcass fracture, instant overflow of high pressure air within tyres caused by impact or cutting that exceeding the tyre strength limit on road, resulting in blasting.