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 Can I use 175 tires instead of 185?
- 5 Can I use 235 tires instead of 225?
- 6 Can I use 215 tires instead of 205?
- 7 Does changing tire size affect transmission?
- 8 What’s the difference between 265 and 285 tires?
- 9 Are wider tires better?
- 10 What does the 65 mean on a tire?
- 11 What is the difference between a 65 and a 70 tire?
- 12 What is the difference between a 60 and 65 tire?
- 13 Do tire sizes have to match exactly?
- 14 Can I use 185 65r15 instead of 175 65r15?
- 15 Can you put different size tires on same rim?

## 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.

## Can I use 175 tires instead of 185?

Absolutely. The difference between the two sizes is negligible (10mm). Understand that the diameter of the **tire** will also slightly increase but also by a negligible amount. Example; **175**–70–14” **tire** is very close in diameter to **185**–65–14” **tire**.

## 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**.

## Can I use 215 tires instead of 205?

Nope. The nominal diameter of the **215’s** is 1.7% greater than that of the **205’s**. The sidewall height is a percentage of the width of the **tire**, so a 55 series is taller with a wider **tire**.

## Does changing tire size affect transmission?

**Changing tire size** doesn’t **affect** your **transmission**, but it **does change** your final drive ratio. The effect is the same as if you had changed your **transmission**. Larger tires will lower your final drive ratio. (as if all your gears were “higher”) Your car will go further with each revolution of the **tire**.

## 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.

## What does the 65 mean on 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 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 is the difference between a 60 and 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.

## Do tire sizes have to match exactly?

That said, the only **dimensions** you can change are the width and aspect ratio — never the wheel **size**, unless you buy replacement wheels — and you should always strive to keep the total height of the **tire** the same as the OEM.

## Can I use 185 65r15 instead of 175 65r15?

All of these sizes fit the stock wheel and work OK for street **use**. The **185**/**65-15** tire size is taller on the sidewall and likely to give a slightly softer ride vs the same tire in **175**/**65-15**.

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

Wheels and **tires** are not interchangeable words. For instance, your vehicle has a set **size** of **rims**, but **you can** buy **different sizes** of **tires** to fit those **rims**, as long as the middle of the **tires** is the correct **size**. That being said, a vehicle with bigger **rims** will often be able to fit larger **tires** than other vehicles.