Do tires need to be replaced after 40,000 kilometers?

[LeJohn]

If the vehicle has traveled 40,000 kilometers but not exceeded 5 years, and the tire wear is not severe, replacement is unnecessary. The following are considerations for tire replacement: Tire replacement principles: Same specifications: Tires of different specifications have varying outer diameters and cross-sectional widths when inflated. Installing them on the same axle will result in uneven load distribution. Same structure: Due to the different carcass structures of radial tires and bias tires, their cushioning performance and circumferential deformation differ. Mixing these two types of tires on the same axle will lead to uneven load-bearing and inconsistent wear. Same material: Same material: Material mainly refers to the carcass cord material. For example, all-steel radial tires and fiber radial tires have significant differences in carcass thickness, cord strength, and heat dissipation performance. Mixing them will affect performance.