Conversion to miles per hour

**means**an L-rated**tire**has a maximum speed of 75 mph and a Y-rated**tire**can be run up to 186 mph. The**tire**with the 101H index is "H" speed rated to a maximum of 130 mph. The**102T tire**has the lower "T" speed rating of 118 mph.1

## What is the R rating on a tire?

Prior to 1991,

**tire speed ratings**were shown inside the**tire**size, before the "**R**" construction type. The available codes were SR (180 km/h, 112 mph), HR (210 km/h, 130 mph), VR (in excess of 210 km/h, 130 mph).**Tires**with a**speed rating**higher than 300 km/h (186 mph) are indicated by a Y in parentheses.2

## What is a touring tire?

Scott Slemmons, senior sales representative, Maxxis: A

**touring tire**is a premium**tire**designed to provide longer tread life, combined with a smooth quiet ride. Most**touring tires**are all-season rated, which provides improved wet and dry road traction.3

## How much does it cost to put a tire on a rim at Walmart?

Despite the low installation fee at Walmart —

**$12**per tire — the package lands in third place. The deal is less generous than that offered by its two top rivals. It includes mounting, valve stems, and lifetime balance and rotation after every 7,500 miles, plus a lug re-torque after the first 50 miles.4

## What is the treadwear rating on a tire?

**Treadwear**. The

**treadwear grade**is a comparative

**rating**based on the wear rate of the tire when tested under controlled conditions on a specified government test track. In theory, this means that a tire with a 200

**grade**will wear twice as long as a tire with a 100

**grade**.

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## What is the load rating on Tyres?

Your tyre's load index relates to its maximum carrying capacity (in kg). You'll find the load rating of your tyre on the sidewall, just to the right of the diameter. For example, a tyre with a load index of 91 can carry

**615kg**of weight.7

## What is AA traction grade?

As of 1997, the

**traction grades**from highest to lowest are “**AA**”,”A”,”B” and “C”. A tire graded “**AA**” may have relatively better**traction**performance than a tire graded lower, based on straight-ahead braking tests. The**grades**do not take into consideration the cornering or turning performance of a tire.8

## What does the ZR stand for on tires?

For

**tires**having a maximum speed capability above 240 km/h (149 mph), a “**ZR**” may appear in the size designation. For**tires**having a maximum speed capability above 300 km/h (186 mph), a “**ZR**” must appear in the size designation. Consult the**tire**manufacturer for maximum speed when there**is**no service description.9

## What is the UTQG rating on a tire?

"

**UTQG**" stands for "Uniform**Tire**Quality Grading". A system developed by the Department of Transportation, which helps consumers compare and rate**tires**on tread wear, traction, and temperature. Example: a**tire**with a**UTQG**of 400 AB. However, please don't link treadwear grades with your projected**tire**mileage.10

## What is the difference between R and Zr?

**What is the difference between R and ZR**tyres ?

**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…

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## What does the R on a TYRE mean?

**R**indicates it is a "radial"

**tyre**construction. Almost all

**tyres**in use today are of radial construction. This

**means**that the plies of

**tyre**cord extend across the casing from bead (also called "heel") to bead. 17: this is the inside diameter of the

**tyre**, in other words the rim height.

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## What is T speed rating?

**Speed Rating**V. Once the highest

**speed rating**a tire could have, “V” used to represent a maximum of 149 mph (240 kph) or more. Nowadays, it means 149 mph but no higher.

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## What do the numbers mean on Tyres?

Example: 215/60R15. 215 is the width of the

**tyre**in millimetres. 60 is the aspect ratio or**tyre**profile. R**means**it is radial construction. 15 is the diameter of the wheel rim in inches.14

## What is H speed rating?

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**.15

## How big is a 285 tire?

The sidewall height or "aspect ratio" of a 285/75/R16 tire is 75% of

**285mm**. Example: 285/75R16 (285 X 75 / 2540 x 2) + 16 =**32.8 inches**tall. Our tire calculator makes this happen for you.16

## How tall is a 285 70 17?

Plus Sizes

265/70-17 | 285/70-17 | |
---|---|---|

Diameter inches (mm) | 31.61 (802.8) | 32.71 (830.8) |

Width inches (mm) | 10.43 (265) | 11.22 (285) |

Circum. inches (mm) | 99.29 (2522.07) | 102.76 (2610.04) |

Sidewall Height inches (mm) | 7.3 (185.5) | 7.85 (199.5) |

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## How tall is a 305 55 r20 tire?

**305**/

**55R20 Tires**.

**305**/

**55R20 tires**have a diameter of 33.2", a section width of 12.0", and a wheel diameter of 20". The circumference is 104.3" and the revolutions per mile are 608.

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## How tall is a 305 55 20?

Plus Sizes

275/55-20 | 305/55-20 | |
---|---|---|

Diameter inches (mm) | 31.91 (810.5) | 33.21 (843.5) |

Width inches (mm) | 10.83 (275) | 12.01 (305) |

Circum. inches (mm) | 100.25 (2546.26) | 104.33 (2649.93) |

Sidewall Height inches (mm) | 5.95 (151.25) | 6.6 (167.75) |

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## How tall is a 315 tire?

While standard SAE tire sizes are easy to understand (a 35x12.50-16 tire runs

**35 inches tall**by**12.5 inches**wide for a 16 inch wheel), many popular tires, particularly those under 35" tall, use harder to visualize metric dimensions (a 315/75R16 tire is 315 mm wide with a sidewall height that is 75% of the width for a