ZR means the tire is capable of speeds in excess of 240 km/h. This ZR designation was established by the European Tires and Rim Technical Organization (ETRTO).
The tire speed rating is the maximum speed at which a tire can carry a load under specified service conditions. The speed rating is not the recommended top speed for your vehicle.
Speed ratings are required on all new tires sold in the U.S. and Canada except for those with a speed capability lower than 130 km/h (81 mph).
The speed rating appears after the load index in the tire size designation. For example, in P215/65R15 89H, “H” is the speed symbol, indicating the tire’s maximum speed capability is 210 km/h (130 mph).
What Does ZR Mean on a Tire?
Tire Speed Rating Chart
- Q 160 km/h (99 mph)
- R 170 km/h (106 mph)
- S 180 km/h (112 mph)
- T 190 km/h (118 mph)
- U 200 km/h (124 mph)
- H 210 km/h (130 mph)
- V 240 km/h (149 mph)
- ZR, W, Y > 240 km/h (> 149 mph)
Can I use ZR tires instead of R?
Yes, you can swap an R-rated tire for a ZR-rated tire. ZR tires are designed to take higher speeds than R-rated tires.
For example, the Michelin Pilot Sport A/S 3+ is rated for up to 186 mph. It has a ZR speed rating.
The Michelin Defender T+H is rated for up to 118 mph. It has an R speed rating. As long as the size of the tire is the same, you can swap them out. ZR Tires are designed for high-powered sports cars and are not suitable for any other kind of driving.
They have a low profile, which means that the sidewall of the Tires is small in relation to the overall size of the Tires. This makes them more prone to damage than other Tires with larger sidewalls.
The ZR rating is given when a Tire has passed more stringent tests than those required by the U.S. Department of Transportation (DOT) and European Union (EU).
ZR Tires have a speed rating of over 186mph, and will not wear out as quickly as standard Tress at lower speeds.
Does ZR mean run-flat?
Some people think that ZR stands for run-flat, but it really stands for “high speed” in German (zur = high and geschwindigkeit = speed).
Yes, there are some ZR tires that are run-flat tires (like the Michelin Defender T+H), and most run-flat tires have a ZR rating, but there are also non-run-flat tires with a ZR rating.
In automotive engineering, the letter R stands for radial. Therefore, when you see this letter on a tire, it means that the internal structure of the tire includes a radial layer where plies run parallel to each other.
In comparison, ZR indicates a tire with a different type of internal construction. In such tires, plies run at an angle of between 30 and 90 degrees with respect to the direction of travel.
So, although both types of tires are radial, they have different structures and properties. ZP is a rating for passenger tires that indicates a run-flat capability.
What does ZE mean on Tires?
ZR is a speed rating that refers to the maximum speed at which a tire can carry a load under specified service conditions. The ZR in your tire size indicates that the tire can go over 149 mph when it’s properly inflated and carrying its maximum load.
The ZR rating was originally introduced by Michelin (which uses “ZR” to indicate a higher speed) and Pirelli (which uses “Z”). Other manufacturers use different designations, such as “W” for “speed rating 168 mph or above,” but all of these ratings are standardized across brands.
Tires without this designation are generally limited to speeds of 149 mph or lower, with some exceptions for trucks and other vehicles. It depends on the size of the tire, usually, if you have 225/40 R18 you might be able to replace them with 225/40 ZR18.
ZR tire speed ratings are only used for tires that are 17 inches in size and larger, where the Z speed rating indicates that the tire can reach speeds up to 149 mph (240 kph.) or higher.
Are ZR tires good for winter?
ZR stands for Zero Radius Tires and these are high-performance Tires. These Tires come with zero radii or a radius smaller than the usual one. The dimensions of low-profile Tires vary depending on the size of the wheel.
The smaller wheels come with a lower aspect ratio. These Tires are used in sports cars, racing cars, SUVs, and some high-end luxury cars as well. While you can use them in other vehicles but they offer better performance in SUVs and sports cars.
These ZR-rated Tires are made with softer rubber compounds so they offer better traction and more grip while cornering. They also offer better acceleration because of the soft compound and low profile.
However, the life of these Tires is shorter because of soft compound rubbers that wear out quickly. They tend to lose their treads quickly so you need to replace them quickly or you might risk your safety on the road.
You can get cheaper versions of these Tires too but they don’t have much traction which makes it difficult for drivers to control their car at higher speeds. So if you are looking for maximum control then go for the expensive variety from a trusted manufacturer like Continental or Michelin etc.
These cheap ZR-rated Tires are only good for driving at relatively low speeds because once you hit the speed, you can be in trouble.
What does ZR rating mean on tires?
ZR is a rating for tires that have a speed capability of above 149 mph. The Z rating is the highest speed capability. That means that a ZR tire can handle higher speeds than other tires. If you see a ZR on the side of a tire, it means that the tire is rated to handle at least 149 mph.
The rating system used to be more generic, with letters like S and T and H designating speeds of 100 miles per hour or less. However, back in the ’80s, tires were being made for sports cars that could go faster than 150 miles per hour, so the National Highway Traffic Safety Administration (NHTSA) decided to create a new rating system to designate these different tires for higher speeds.
In 1984, NHTSA came up with the Speed Rating System, and Z was designated as the top speed rating, meaning it could handle over 149 mph.
For example, if you had an older Porsche 911 from before 1984 and wanted to upgrade your car’s handling and performance by getting new tires, you might see something like P205/60ZR16 on your new tires or on a set of tires you’re considering purchasing.
What does ZR mean on a speedometer?
ZR stands for Z-Rated. Z-rated tires are not designed to be used at speeds below 149 mph. The speed rating is usually found after the load index on the tire’s sidewall. For example, a tire with a size of P245/50ZR16 91W has a speed rating of 149+ mph and a load index of 1601 lbs.
The speed rating of a tire indicates the maximum safe speed at which the tire can carry a load under specified service conditions. Speed ratings are required for all tires sold in the United States, but only for tires that can sustain high speeds.
The speed rating is represented by a letter of the alphabet and follows immediately after the load index in a tire size designation such as P235/70R15 97H. The higher the letter and number combination, the greater the speed at which you can safely drive your vehicle when using these tires.
Are ZR Tires still relevant?
ZR tires are performance-oriented tires. They have a very low aspect ratio, which means the sidewall of the tire is very short. This gives better handling and steering response but at the cost of ride comfort.
The ZR rating has been discontinued by the Tire and Rubber Association, so you might not see ZR on new tires anymore. That being said, the replacement for ZR is a W speed rating. W stands for 270 km/h (168 mph) and is only to be used on cars that can go at over 270 km/h (168 mph).
So, if you’re looking for high-performance tires with a low aspect ratio, look for tires with W speed rating.
What does “speed rating” mean on a tire?
The speed rating of a Tires is represented by a letter of the alphabet at the end of the Tires size code and indicates the maximum speed capability of the Tires.
The speed rating of a Tire must match or exceed the maximum speed capability of the vehicle as stated by the vehicle manufacturer. The ZR on your Tires corresponds to a maximum speed capability of over 240km/h (150mph).
The aim was to provide consumers with better information regarding a Tire’s capabilities and to allow them to make a more informed decision when buying Tires. Prior to the introduction of speed ratings, it was impossible for consumers to know for sure what top speed their Tires could handle.
frequently Asking Question
Are ZR tires good?
ZR tires are tires with a high-speed rating. ZR tires can be used for racing, but they can also be used for daily driving. The majority of ZR tires are performance summer tires. However, there are all-season and winter ZR-rated tires available. ZR stands for “z maximum speed rating”. The “Z” means that the tire is rated at speeds over 149 mph (240 km/h).
Are ZR tires all-season?
All-season tires are designed to provide a comfortable ride, good tread life and all-weather traction, including light snow. They use harder rubber compounds than summer performance tires to reduce rolling resistance and increase tread life. They have more sips (thin slits in the tread) than summer performance tires to help improve grip on wet and snow-covered roads. The tradeoff is that they may not have as much grip on dry roads as summer performance tires or handle as well in winter conditions as dedicated winter/snow tires.
What does Michelin ZR mean?
Michelin ZR-rated tires are a popular choice for aftermarket tires, and come in sizes ranging from 13 inches all the way up to 20 inches. The ZR rating indicates that these tires are capable of handling high speeds. This makes them ideal for sports cars, luxury sedans, and other vehicles that are designed for speed.
The Michelin Pilot Sport A/S Plus ZP is an Ultra-High Performance All-Season tire developed for the drivers of rear-wheel-drive coupes and sedans. The Pilot Sport A/S Plus ZP delivers high-speed stability, responsive handling, and all-season traction along with impressive tread life for some of the world’s most prestigious high-performance vehicles.
What is BSW sidewall?
Tire sidewall markings are important because they tell consumers what type of tire they’re buying. Having a basic understanding of how to read tire sidewalls can help you make an informed decision when purchasing tires for your vehicle. Reading a tire sidewall isn’t difficult: it just requires knowing what all of these numbers and letters mean before you make a purchase.
The “Z” in the tire’s rating stands for speed. In this case, it means that the tire is able to handle speeds greater than 149 miles per hour. The “R” in the rating refers to radial construction, which is the standard type of tire construction used on most passenger vehicles today.
High-performance vehicles need special tires designed to handle high speeds safely and reliably. A regular touring tire won’t perform well at high speeds because of its tread design and rubber compound.