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). Before 1990, the manufacturers used “ZR” to mean high performance tyres before the ratings got refined with W, Y…

**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). Before 1990, the manufacturers used “**ZR**” to **mean** high performance tyres before the ratings got refined with W, Y…

Beside above, what is the difference between Zr and R rated tires? In both the **ZR and R**, **R** means radial. Z is the speed **rating** of the **tire**. Z **rated tires** are high performance **tires**.

Similarly, what does the 265 70r17 mean?

**265**. This number indicates that your tire has a width of **265** millimeters. 70. This number **means** that your tire has an aspect ratio of 70%. In other words, your tire’s sidewall height (from the edge of the rim to the tire’s tread) is 70% of the width.

What do all the numbers on a tire mean?

The two-digit **number** following the slash in the **tire** size description is the **tire’s** aspect ratio. It is the sidewall height expressed as a percentage of the **tire’s** width. If the markings say 255/55R18, it **means** that the height of the sidewall is 255 multiplied by . 55, or 140 millimeters.

### What does 94v mean on a tire?

The letter part of this is the speed rating – the maximum supported speed for the tire. Again, from Tire Rack: So a tire rated at “94V” can support 670kg at 240km/h.

### What is Z in tire size?

Exotic Sports Cars. 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.

### What does R stand for on a tire?

radial

### What does 91v mean on a tire?

The markings 91V are the load index and the speed rating, or the service description. The load index (91) is the assigned numerical value for the tire size to compare relative load carrying capabilities. The table below shows the load indexes of the tires that are commonly used in passenger cars and light trucks.

### Should I get H or V rated tires?

To support running at higher speeds, V-rated tires will have a stiffer sidewall and slightly firmer ride than H-rated tires. For normal driving conditions the H-rated tire will provide a more comfortable ride and the V-rated should give slightly better handling.

### What does H and T mean on tires?

As you probably already know, T tires are rated up to 118 mph and H tires are good to 130 mph.

### What does 91t mean on a tire?

Tire load index chart and understanding your tire’s code The service description is simply the speed rating and the load rating together. In our example, the service description is the last three characters: 225/45R17 94H 94 is the load rating and H is the speed rating.

### What does 55 R mean on a tire?

The sidewall height, from rim to tread, is 55 % of the section width of 205, or 112.75 millimeters (4.44 inches). The last part is the internal construction of the tire. R stands for radial constuction, in which the tire’s body plies “radiate” out from the imaginary center of the wheel.

### What does 265 65r18 mean?

Tire sizes are easy to understand once you learn how to read them. On this page you’ll find a color-coded explanation of the 265-65R18 tire code. This number means that your tire has an aspect ratio of 65%. In other words, your tire’s sidewall height (from the edge of the rim to the tire’s tread) is 65% of the width.

### What do the 3 numbers mean on tire size?

B: TIRE WIDTH The three-digit number following the letter is the tire’s width (from side to side, looking at the tire head on) in millimeters. It’s the height of the sidewall measured from wheel rim to top of the tread, expressed as a percentage of tire width. In other words, it’s sidewall height divided by tire width.

### Can you put different width tires on same rim?

Rim Width Range. Because tires have flexible sidewalls, a single tire size will fit on a variety of rim widths. The industry rule of thumb is that for every 1/2″ change in rim width, the tire’s section width will correspondingly change by approximately 2/10″.

### What is the difference between 225 and 265 tires?

Re: Truck tires: 225/60R16 vs 265/75R/16 Signifigantly different – 265/75 has a sidewall height of 7.8″, 225/60’s sidewall is 5.3″. This will affect the ride much firmer), as well as your speedometer/odometer – will read 16% too fast – the 225/60s are 5″ shorter

### Can tires be put on backwards?

two front tires from side-to-side. Directional tires can be moved from side-to-side for testing purposes. The short time that they are on the vehicle backwards will not harm the tire. Results * If the vehicle pulls in the opposite direction, the defective tire is one of the front tires.

### What size is a 265 70r17?

P-Metric Tire Sizes – P-Metric to Inches Conversion Chart Rim Size P-Metric Size Tread Width 17 Inch 255/80R17 10.0 inches 265/70R17 10.4 inches 275/70R17 11.0 inches 285/70R17 11.2 inches