×
Offers extended
Great deals on selected car tyres
choose our fully fitted service
2,200+ local fitting partners
over 2 million customers served
21 years of exceptional service

Tyre Size by Registration

Lifetime Guarantee on all tyre brands

We're thrilled to provide a Lifetime Guarantee that covers all tyre brands. Peace of mind, at no extra cost.

Lifetime Guarantee

Best Site 2024 in Auto Express Awards

For the 10th year we have been named Best online tyre retailer by Auto Express - buy today to discover why.

Blackcircles.com is named best site

Continental SportContact 7

Find out about the SportContact 7. An ultra high performance tyre - that will deliver confidence, safety and stability on both wet and dry roads.

SportContact 7

Tyre Size by Reg: Frequent Asked Questions

Can you find tyre size by reg?

Yes, you can find the tyre size for your vehicle using your registration number. On Blackcircles.com, simply enter your vehicle registration number into our tyre finder tool. Our system will automatically provide the tyre size(s) that's registered with your vehicle's make and model. However, it's always a good idea to double-check the tyre size physically on your vehicle. To make sure you are ordering the correct size.

How do I find out my tyre size?

You can find your tyre size by looking directly at the sidewall of your tyre. Tyre sizes are composed of a series of numbers and letters which indicate specific aspects of the tyre. For example, a tyre size might read as 205/55 R16 91V, where each part has its specific meaning related to the tyre's dimensions and capabilities. For more information, check our tyre size guide

The alternative is to find your tyre size by reg. Simply enter your registration plate number into our search tool and we will present you with a tyre size for your vehicle. It always best to double check this against your current tyres though, to ensure you are presented with the correct tyre size for your car.

What tyres did my car come with?

The original tyres that your car came with are typically determined by the car manufacturer's recommendations and are chosen to complement the performance and handling characteristics of your vehicle. To find out the specific tyres your car was equipped with initially, you can check your vehicle's owner's manual, look for a tyre information sticker, or contact the manufacturer or dealership.

Understanding your tyre size

Understanding your tyre size is crucial for safety and performance. Here's a breakdown of what each part of the tyre size means:

Tyre Width (e.g., 205): This is the width of the tyre from sidewall to sidewall, measured in millimetres.
Aspect Ratio (e.g., 55): This number is the height of the tyre sidewall as a percentage of the tyre's width. A lower number indicates a lower profile tyre.
Construction Type (e.g., R): This letter indicates the tyre's construction. 'R' stands for radial, which means the layers run radially across the tyre.
Rim Diameter (e.g., 16): This number indicates the diameter of the wheel rim that the tyre can be fitted to, measured in inches.
Load Index (e.g., 91): This number corresponds to the maximum weight each tyre can support.
Speed Rating (e.g., V): This letter indicates the maximum speed capability of the tyre under specific service conditions.

For optimal performance and safety, always ensure your tyre's specifications match your vehicle's requirements and driving conditions.

Low prices on big tyre brands

Since 2001, we’ve been making it as easy as possible to buy cheap tyres online, whilst also offering a great selection and fantastic savings.

Whether you are in the market for cheap budget, mid-range or premium tyres, you will find that Blackcircles.com stocks a wide variety - from the world’s most renowned tyre manufacturers. With local garage or mobile fitting available.

If fully fitted is not an option you require, you can also have them delivered directly to a location of your choice - whether it's your own address, or that of your own fitter. Simply select the 'Mail Order' option when buying online through Blackcircles.com.

Blackcircles.com News

Company News and Industry Comment

Blackcircles.com Latest Tyre News & Information

In the Blackcircles.com news section, you can find the latest information from the world of tyres - covering product launches, interesting facts, help & advice and much more. Whether it's how to prepare your car for its next MOT or news of the latest tyre to launch into the market - our news section will keep you up to date with the latest stories from the tyre and motoring industries. Read the latest tyre news