Do I need Z rated tires?

For tires with a maximum speed capability higher than 240 km/h (149 mph), a “ZR” may appear in the size designation. Tires with a maximum speed capability higher than 300 km/h (186 mph), require a “ZR” in the size designation. Consult the tire manufacturer for maximum speed when there is no service description.

What does Z rating mean on tires?

While a Z-speed rating still often appears in the tire size designation of these tires, such as 225/50ZR16 91W, the Z in the size signifies a maximum speed capability in excess of 149 mph, 240 km/h; the W in the service description indicates the tire’s 168 mph, 270 km/h maximum speed.

Are Z rated tires repairable?

Can tires rated H (130 m.p.h.), V (more than 130 m.p.h.) or Z (more than 149 m.p.h.) be safely repaired? Yes, with some reservations. Most punctures can be repaired, and the tire returned to service, as long as the puncture is in the tread area. If the damage is in the shoulder or sidewall, however, replace the tire.

When does a tire have a Z speed rating?

…recommendations and the tire’s rated load capacities are customized when speeds exceed 160 km/h (99 mph) for all tires up to and including a V-speed rating, and when speeds exceed 190 km/h (118 mph) for all tires that are Z-speed rated and above.

What’s the maximum speed of a V rated tire?

Here, the tire would have a speed rating of V. V-rated tires can be driven at 149 MPH. Tires having a maximum speed capability over 149 MPH may have “ZR” in the size designation.

What do you need to know about ZR tires?

ZR Designation. Tires having a maximum speed capability over 149 MPH may have “ZR” in the size designation. Tires with a maximum speed capability over 186 MPH are required to include “ZR” in the designation. Below are examples of tire sizes with a “ZR” speed rating.

What’s the maximum inflation pressure on Z rated tires?

You’ve got Z-speed rated tires after all. …100% 39 1000 Note: Never exceed the maximum cold inflation pressure branded on the tire’s sidewall. More Speed Rating Charts * R-Speed Rated Tires * S-Speed Rated Tires * T-Speed Rated Tires * H-Speed Rated Tires * Z-Speed Rated Tires * V-Speed Rated Tires * W-Speed Rated Tires * Y-Speed Rated Tires