What does 180 55 zr17 73W mean?
ZR 17 then: M/C (73W) Here is what these codes mean: 180 : The width of the tyre, expressed in millimetres. The aspect ratio (the sidewall height as a proportion of the tyre width). ZR : The R stands for Radial construction. A: ZR basically means the tire is adapted for speeds above 149mph. ZR tires includes the speed ratings V(149mph), W(168mph) and Y(186mph). The R stands for radial.A tire’s certified speed rating is indicated by a letter between A and Z listed at the end of the tire code, with letters later in the alphabet corresponding to higher speeds. For example, in this tire code P275/40ZR17 93W, the tire speed rating is W, which means the tire can withstand up to 168 MPH.ZR basically means the tyre is adapted for speeds above 149 mph. ZR tyres includes the speed ratings V(149mph), W(168mph) and Y(186mph).
What does zr17 mean on a tire?
A: ZR basically means the tire is adapted for speeds above 149mph. ZR tires includes the speed ratings V(149mph), W(168mph) and Y(186mph). The R stands for radial. Priority Tire ✅ At one time, Z-rated tires were thought to be the highest rated tires a vehicle would need. But the development of faster vehicles brought us two new speed ratings: W and Y-rated tires, both of which are rated for higher speeds than the Z despite their earlier place in the alphabet.
What is the difference between R17 and Zr17 tyres?
The letter R composed on a tyre implies that the tyre uses a radial development while the letters Z and R together signal the speed rating of the tyre. By and large, the letters ZR were related to a kind of performance radial tyre that was evaluated for speeds over 149mph. Generally, the higher in the alphabet a tire is rated, the better it will manage heat and faster speeds.