Pic. 7.20. The structure of the multilayer tire: 1 - protector; 2 - breaker (substrate): reduces rolling resistance; 3 - nylon cord: increases the speed characteristics of the tire; 4 - a layer of steel cord: increase directional stability when driving; 5 - carcass: gives the tires shape and strength; 6 - airtight inner layer (core): replaces the camera; 7 - sidewall: protects the frame from damage; 8 – side profile: provides driving stability and controllability; 9 - side ring: provides a snug fit on the wheel; 10 - rim shelf: serves for good handling and high directional stability
The structure of the carcass, the composition of the rubber and the complex tread pattern make it possible to attribute modern tires (pic. 7.20) to genuine high-tech products that make a significant contribution to the passive safety of your car. Tires carry the weight of the car, absorb shocks when hitting bumps in the roadway and serve to transmit power when driving, braking, maneuvering.
The mileage of tires mounted on the front wheels averages 15,000-35,000 km, on the rear wheels - 30,000-50,000 km. At the latest, after seven to eight years, tires become unusable, as the rubber composition loses its properties over time.