Contents

- 1 What do the 3 numbers mean on tire size?
- 2 What does the 265 70r17 mean?
- 3 Can I use 60 instead of 65 tires?
- 4 What do the letters on tires mean?
- 5 Can I use 235 tires instead of 225?
- 6 What number is the height of a tire?
- 7 What’s the difference between 265 and 285 tires?
- 8 Are wider tires better?
- 9 Are 285 tires the same as 33?
- 10 What is the difference between a 60 and a 65 tire?
- 11 What is the difference between 60 and 70 series tires?
- 12 What is the difference between a 65 and a 70 tire?
- 13 What does the Z mean on tires?
- 14 How tall is a 17 inch tire?
- 15 Should I get H or T rated tires?

## 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.

## What does the 265 70r17 mean?

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. In this case, the sidewall height works out to be 185 millimeters.

## Can I use 60 instead of 65 tires?

Physically, yes they will fit. It is recommended to stay within 3% of the original **tire** size on the car though. The size you have is 3.09% smaller, so not recommended. You **could** go with 205/**60**-15 though if you **can** get a better deal on that size.

## What do the letters on tires mean?

The number is the load rating, or the amount of weight that it can handle. The **letter** is the speed rating, or the maximum speed the **tire** is built for. As an example, a **tire** rated 90R could safely carry 1,323 pounds and travel at 106 mph.

## Can I use 235 tires instead of 225?

Yesthat size will work 100% perfectly, as it is the exact same diameter as the **225**/75-16. **235**/70-16 is actually a shorter **tire**.

## What number is the height of a tire?

The **two**-digit number after the slash mark in a tire size is the aspect ratio. For example, in a size P215/**65** R15 tire, the **65** means that the height is equal to **65**% of the tire’s width. The bigger the aspect ratio, the bigger the tire’s sidewall will be.

## What’s the difference between 265 and 285 tires?

The larger **285**/70R17 **tire in the** photo above stands over an inch taller and is nearly an inch wider than the **265**/70R17 size. The width of the tread is also a half-inch wider. Many late-model domestic trucks accept this **difference** in size.

## Are wider tires better?

From a safety point of view, both types have their **good** sides: On a dry road, **wider tires** will offer more grip than narrow ones, but the risk of aquaplaning will be higher with **wide tires**. – In the winter, narrow **tires** are **better** under extreme conditions as they provide higher surface pressure against the road.

## Are 285 tires the same as 33?

**285**/75/16 is the metric equivalent of a **33**″ **tire**. Although the **285**/75/16 is usually the accepted metric size for **33’s**, the actual diameter of the **tire** varies from manufacturer to manufacturer. **285’s** actually vary in true diameter. Meaning some are smaller than **33**″ and some are larger.

## What is the difference between a 60 and a 65 tire?

The **65**% aspect ratio (as **in** 235/**65**/17), compared to **60**%, adds almost 12 mm (1/2″) to the radius of the **tire** (0.65-0.60)*(235mm)=11.75mm.

## What is the difference between 60 and 70 series tires?

The **series** is a % of the sidewall compaired to the width. A **70 series tire** sidewall height is **70** % of the **tires** tread width, a **60 series tire** has a sidewall hight of **60**% of the **tires** tread width.

## What is the difference between a 65 and a 70 tire?

The series number **in a tire**-numbering system refers to the aspect ratio of the **tire’s** sidewall height to its width. A series **65 tire’s** height is **65** percent of its width, a series **70 tire’s** height is **70** percent of its width and so on.

## What does the Z mean on tires?

A “**Z**” rating can **mean** different things. While it nearly always **means** a high performance **tire** for high-performing sports cars, “**Z**” may actually appear in the middle of a **tire’s** size information. When it **does**, it represents either a maximum speed of more than 149 mph (240 kph) or 186 mph (300 kph).

## How tall is a 17 inch tire?

17 INCH TIRES |
TIRE HEIGHT |
---|---|

225 35 17 |
23.20 |

245 35 17 |
23.75 |

315 35 17 |
25.68 |

335 35 17 |
26.23 |

## Should I get H or T rated tires?

**Tires** with higher speed ratings generally **have** better steering response and cornering grip than lower-speed **rated tires**, in addition to being capable of higher speeds. So if your car originally came with **H**–**rated tires**, that’s what you **should** replace them with. Sticking with **H**–**rated tires** comes at a cost.