What does zr17 mean on a tyre?

The letters ZR on the sidewall relate to a tyre’s speed rating, which in this case is 150mph. That means it should not be driven at speeds in excess of 150mph (240kmph) – of course, where such speeds are even legal! Before 1990, ZR was used for high-performance tyres.

Is R or Zr better for tires?

Thus, a ZR tyre has a speed index of V, W, or Y. R indicates that the structure is RADIAL. So, VR indicates that the tyre has a RADIAL structure and a speed index equal to V. There is therefore no difference between a ZR or an R tyre with the same speed index.

What is the difference between Zr and R tires?

ZR tires were historically known as “performance-rated tires” with a speed rating of more than 149 mph while the letter R on a tire represents both the fact that it is built with a radial construction in mind and the fact that it is speed rated for 106mph.

Does Zr mean run-flat?

The following letter(s) describe the construction: R is for radial; ZR stands for a Z-rated radial (see service description); and ZRF means Z-rated run-flat (rare). The last two-digit number is the diameter of the applicable wheel, in inches.

Are ZR tires run-flat?

All ZRtyres locations carry a massive range of Run-flat tyres in stock for all popular makes and model of cars, as well as having the correct tyre fitting and balancing equipment to fit these specialist tyres correctly without damage.

What does 92w mean on a tire?

92w the first two numbers 92 refer to the load rating and the letter w refers to the maximum speed rating. 92=1,389 pounds (a mid-rating) and W=168 mph (extremely high!)

Should all 4 tyres be the same brand?

Primarily, you should avoid mixing different tyre brands and different tread patterns. There are rare exceptions for approved mixed-tyre fittings, but in general, manufacturers do not recommend tyre mixing at all.

What is the difference between W and V rated tyres?

The speed rating of a car tyre indicates the top speed that a tyre is able to safely travel at….Where Can I See My Tyre Speed Rating?

Speed Rating Max Speed (Mph) Max Speed (Kph)
V 149 240
W 168 270
Y 186 300

What is Zr in tire size?

Tire Speed Rating Chart 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.