1, too fast, too heavy load, too high tire temperature and fire.

2. The bearing is on fire, igniting the tire.

3. The brakes are locked, resulting in excessive friction and spontaneous combustion.

4. Long-distance transportation and overload transportation will cause serious tire wear, and the brake caliper and brake disc will wear for a long time, generating a lot of heat energy, and the tire will burn when it reaches the ignition point.