What does 35R mean on a tire?
R means radial tire. They’re all radials nowadays. Speed ratings are usually inserted before the r. the most common speed ratings are hr (good for 130mph), vr (149 mph), and zr (more than 149 mph). A: the difference between the r rated and zr rated tires is that the r rated tires have a maximum speed capability above 240 km/h (149 mph), while for zr tires the maximum speed capability may be above 300 km/h (186 mph).
What is the 3% rule for tires?
The 3% rule states that when replacing tires, the new tire’s diameter should not differ from the original by more than 3%. This guideline helps maintain proper vehicle performance, safety system functionality, and speedometer accuracy. Generally, you don’t want to go with tires that have a diameter that is more than 3% different from the factory tires. It’s also a good idea to consult with a trusted mechanic before switching to larger or smaller tires.Larger tires require more energy from the engine to move the vehicle compared to smaller tires, resulting in increased fuel consumption. Smaller tires and wheels demand less engine output, making them more suitable for navigating stop-and-go city traffic efficiently. Larger and heavier tires do offer advantages.
Does the R matter in tire size?
Radial tires are the most common tires on the road in the United States today; thus “R” will usually be shown in the tire size designation. Radial construction means the tire’s internal ply cords are oriented in a radial direction, from one bead over to the other, essentially perpendicular to the direction of rotation. R” stands for the construction method of the tyre indicating the tyre is a radial tyre. The following two numbers (16) indicate the diameter of the wheel rim in inches. The next two or three numbers (94) indicate the load index of the tyre.