# Quick Answer: How Do I Know My Tire Size In Inches?

## Can I use 235 tires instead of 225?

Obviously, you will need a certain kind of tire depending on how you use your vehicle.

Due to this, a 235 tire might not be better than a 225 tire, or vice versa, but depending on your situation, one tire might serve you better than the other..

## How do you tell the size of a tire?

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. In this example, the aspect ratio is 65, meaning the sidewall is 65 percent as high as the tire is wide.

## How do you tell how big your tires are in inches?

A standard sized tire will be displayed in inches. A tire that reads 33 x 12.5 R15, is 33-inches in diameter (or tall), 12.5-inches wide, and will fit a 15-inch wheel. The door jam of your vehicle will also indicate what size tires the manufacturer recommends.

## How do you read a tire date code?

The last four digits of this code tell you when your tire was manufactured. The first two numbers indicate what week of the year it was made (out of 52 weeks per year), and the second two numbers represent the year. For example, 5200 would reveal that a tire was manufactured during the 52nd week of the year 2000.

## Do Tyres expire?

The fact is that all tires have an expiration date. … Every tire has a birth date—the day it was manufactured—and an expiration date that is six years from that manufacture date. Most automobile manufacturers warn drivers to replace vehicle tires after six years.

## How do you find the height of a tire?

The sidewall height can be calculated by multiplying the ratio (70 or 0.70) by the width (225); for example, 225 millimeters x 0.70 = 157.5 millimeters. The number 15, or R15 is the diameter of the wheel (or rim) given in inches.

## How wide is a 275 tire?

Equivalency tableRim widthMinimum tire widthIdeal tire width10,0 Inches255 mm265 or 275 mm10,5 Inches265 mm275 or 285 mm11,0 Inches275 mm285 or 295 mm11,5 Inches285 mm295 or 305 mm12 more rows

## How old can a tire be and still be safe?

six yearsOld tires are dangerous, regardless of tread depth. While there’s no federally sanctioned safety guidance on when a tire is too old to be safe, many carmakers recommend replacement at six years from the date of manufacture. Old tires have been the culprit in fatal accidents.

## How do you date old tires?

Tires Manufactured Since 2000 Since 2000, the week and year the tire was produced has been provided by the last four digits of the Tire Identification Number with the 2 digits being used to identify the week immediately preceding the 2 digits used to identify the year.

## What is the rim diameter?

Rim Diameter The next number is the diameter code, in inches, of the rim onto which the tire can be mounted. For example, a tire with the P225/70R16 91S would fit a rim with a 16-inch diameter. View Other Common Diameter Sizes: 14-Inch Diameter.