What do zr and r mean on tires?
R means radial – which 99. There is another letter that is added to this – the speed rating. A ZR code means that it has the highest speed rating available – well over 150MPH. Other speed ratings have limited top speed allowances. The higher rated tyres, specifically W rated tyres, tend to be required on high-performance sports cars. So, what does tyre rating W mean? It means that you have a car that is capable of driving safely at high speeds up to 168 mph.Description / Laufenn Tires-S FIT AS 225/40ZR18 92W XL BSW It has a Load Index of 92 which means the tire is rated to hold up to 1389 lbs. The tire has a Speed Rating of W so it is rated to go up to 168 mph.The 225/40R19 93W tire has the following features: the first three digits refer to the width of the tire in millimetres. The second two-digit number refers to the ratio between the height of the sidewall and the width of the tire. R stands for “Radial” and the last two figures 19 indicate the wheel diameter in inches.Z-rated high-performance tyres are rated for speeds in excess of 149mph. Confusingly, W-rated tyres are rated at a higher speed in excess of 168mph. Y-rated tyres are rated in excess of 186mph.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.
Are zr or r tires better?
ZR tires deliver precision and performance at high velocities, offering unparalleled grip and responsiveness, whereas R tires provide enduring reliability, comfort, and safety for everyday driving conditions. Speed rating W A relatively new addition to the speed rating chart, tires with speed rating “W” can achieve a maximum sustained speed of 168 mph (270 kph).ZR, W & Y Speed Ratings Originally, tyres with a ZR rating were designed for speeds over 150mph (240 km/h).A: 92w the first two numbers 92 refer to the load rating and the letter w refers to the maximum speed rating. W=168 mph (extremely high!
What is the difference between W and ZR Tyres?
ZR, W & Y Speed Ratings Originally, tyres with a ZR rating were designed for speeds over 150mph (240 km/h). However, as vehicle performance increased, additional ratings were introduced: W: up to 169mph (270 km/h) 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. These speed ratings provide a more precise indicator of a high-performance tire’s speed over 149MPH.Some drivers wonder, Can you mix ZR and R tires? Mismatched tires can contribute to uneven handling and unexpected traction, particularly when hard braking or turning is involved.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.
What does R mean on tyres?
The letter R means the tyre is a radial construction. Almost all new car tyres are radials. R” stands for the construction method of the tire indicating the tire is a radial tire. The following two numbers (16) indicate the diameter of the wheel rim in inches.ZR means the tire can handle speeds over 150mph. R18 is the rim diameter the tire fits on. W is the load and speed rating. XL means the tire is “extra load”.