Is it serious if a piece of the tire tread crown falls off?

[SanDominic]

Tire tread crown falls off a piece is not serious if it does not affect driving. Introduction to car driving: Car driving has become one of the basic skills that modern people need to master. To master the technology of driving a motor vehicle, first of all, it is required to have qualified age and physical conditions; also need to go through the training and examination of road traffic safety laws and regulations, relevant automobile mechanical knowledge and safe driving knowledge; after passing the examination, then carry out the training and examination of driving skills; all examinations passed can get the driving license of small cars or large and medium-sized trucks. Age limit for car driving: To apply for the driving license of small cars, small automatic transmission cars, and light motorcycles, the age should be above 18 years old and below 70 years old.