Checking your tyre size is a straightforward task that any driver should know how to do. Knowing your tyre size is important for various reasons, including buying new tyres, checking for proper inflation, and ensuring that you have the right size spare tyre. Here’s how to check your tyre size.
Step 1: Locate your tyre size information
The first step in checking your tyre size is to locate the tire size information on your tyre sidewall. The size is usually listed in the following format: 205/55R16. This combination of numbers and letters represents the tyre width, aspect ratio, and wheel diameter.

Step 2: Identify the tyre width
The first number in the tyre size indicates the tyre width in millimetres. In the example above, the tyre width is 205mm.
Step 3: Determine the aspect ratio
The next number in the tyre size is the aspect ratio, which represents the height of the tyre’s sidewall as a percentage of its width. In the example above, the aspect ratio is 55, which means the sidewall height is 55% of the tyre’s width.
Step 4: Identify the wheel diameter
The last number in the tyre size indicates the wheel diameter in inches. In the example above, the wheel diameter is 16 inches.
Step 5: Check for additional tyre information
In addition to the tyre size, the sidewall of your tyre may also include other information, such as the tyre’s load index and speed rating. These numbers represent the tyre’s maximum load capacity and speed rating, respectively.
In conclusion, checking your tyre size is a simple process that can be done in a matter of minutes. By knowing your tyre size, you can ensure that you purchase the correct replacement tyres, maintain proper inflation, and ensure that you have the correct size spare tyre.
Whatever your vehicle, here at Tyreland, weโve got the biggest range of budget, mid-range and branded tyres at the best possible prices on the market. To enquire about stock or to find your nearest location, call today on 01 860 20 20. Donโt forget to ask about our other services too.







