# Tire hookup

### Index

- How do you date a tire with a dot number?
- How do I find out how old my tires are?
- Where can I find the circumference of a tire?
- What do the numbers on tires mean?
- What do the numbers on a tire date code mean?
- How to read DOT numbers on tires?
- How do I tell what year my tires are made?
- How do I Register my tires with the dot?
- Where can I find the size of a tire?
- How do you measure the circumference of a bike tire?
- How does the tire size comparison work?
- What is the tire calculator?
- What do the numbers and Letters on a tire mean?
- What do the numbers on a tire sidewall mean?
- What does the load index of a tire mean?
- What do the numbers mean on a tyre profile?

### How do you date a tire with a dot number?

Tires produced after January 1, 2000 will have a four-digit date code at the end of the DOT number, as displayed in our example. The first two digits represent the week of production and the last two digits represent the year. So, the number in our 3xample, 1016, indicates that the tire was produced in the 10th week of the year 2016.

### How do I find out how old my tires are?

The last set of characters is the tire date code and it tells you the week/year your tires were manufactured. Tires produced after January 1, 2000 will have a four-digit date code at the end of the DOT number, as displayed in our example.

### Where can I find the circumference of a tire?

Tire Circumference Chart Please use this chart for your reference. Tire size is shown on the side of a tire. Tire circumference may vary depending on tire pressure.

### What do the numbers on tires mean?

The U.S. Department of Transportation (DOT) requires that every tire manufacturer provide a standardized identification number or code. This consists of the manufacturers plant code, the tire size, brand, and the week/year the tire was made.

### What do the numbers on a tire date code mean?

The first two numbers represent the week of manufacture, the last two numbers indicate the **year**. On this **Michelin** **tire**, the date code is “2118.” Which indicates the **tire** was manufactured in the 21 st week of the **year**. The number “18” represents the **year** 2018.

### How to read DOT numbers on tires?

1 Ways to Get Your Tires DOT Number. Look at all the sides of the tires. There are a bunch of numbers and letters. It might seem like a jumble. But this ... 2 Tires Manufactured 2000 & After. 3 Tires Manufactured Before 2000. 4 What About the Incomplete DOT Numbers. 5 Reading DOT Tire Numbers.

### How do I tell what year my tires are made?

For tires manufactured in the year 2000 – present. The date of manufacture is the last four digits of the DOT code. The first two digits are the week of manufacture, and the last two digits are the year.

### How do I Register my tires with the dot?

Register your tires with the DOT. When you purchase new tires, your installer should provide you with a DOT card, so that you can record the DOT numbers of your tires and send them to the manufacturer. This information is important, as itll be used to notify you in the event of a tire safety recall.

### What do the numbers and Letters on a tire mean?

The next text you’ll see is a number-letter combination. 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.

### What do the numbers on a tire sidewall mean?

Theres a massive amount of information branded on the sidewall of every tire ... but its written in code. The tire size is just one small piece of this code. The tire size P225/45R17 91V may not mean much to the average person, but to tire geeks like us it speaks volumes.

### What does the load index of a tire mean?

The load index symbol indicates how much weight a tire can support, based on the following standard chart. In our example, the load index is 89, which indicates the tire has a load capacity of 1,279 pounds, when inflated to the tire’s maximum air pressure rating. G: SPEED RATING The last letter is the tire speed rating.

### What do the numbers mean on a tyre profile?

The two digits following the first slash are what is known as the aspect ratio. Essentially this is the height of the tyre as a percentage of the width. So, in the example, the tyre has an aspect ratio of 55, meaning the profile height is 55% of its total width (107.25mm). Simply enter your car reg and choose from the best available options: