For 4WD and AWD vehicles, what must be true for all four tires?

For 4WD (Four-Wheel Drive) and AWD (All-Wheel Drive) vehicles, it is essential that all four tires are marked with the same size. This is critical because these systems distribute power to all wheels, and having tires of different sizes can cause uneven wear and tear, as well as create handling issues. When tires are not the same size, it can lead to differences in wheel speed, which can ultimately harm the drivetrain and possibly result in costly repairs.

While having the same brand, tread pattern, or installing tires at the same time may also contribute to better performance and handling, it is the tire size that has a direct impact on how all wheels interact with the drivetrain of 4WD and AWD systems. Uniform tire size ensures that each tire rotates at the same speed, promoting optimal traction and stability, especially in challenging driving conditions.