Back to Tyre Guides & Advice >
Use our vehicle registration lookup tool to quickly find the correct tyre size for your vehicle. Simply enter your registration to view matching tyre sizes and options.
You can also check your tyre size manually by looking at the sidewall, your vehicle handbook, or the manufacturer’s information. This guide explains how to find your tyre size and what the numbers mean.
Enter your registration or tyre size to view available options for your 4×4, SUV, or van.
Not sure what size you need? Use your registration to find the correct fitment instantly.
Knowing how to find your tyre size helps you choose the right tyres for safety, performance, and compatibility.
Finding your tyre size is essential for safe fitment, proper handling, and optimal performance. Whether you’re replacing worn tyres or upgrading your setup, knowing the correct tyre size helps you choose the right option for your vehicle.
You can find your tyre size in three main places:
The tyre sidewall will show a code like 205/55R16. This series of numbers and letters represents the tyre’s width, profile, construction, and rim diameter.
Here’s what each part means:
It’s important to choose the correct tyre size for your specific vehicle, as requirements vary by make, model, and year. You should always check your vehicle handbook or consult a tyre specialist if unsure.
Alongside size, factors such as load rating, speed rating, and tread pattern also play a key role in safety and performance.
The easiest way to find your tyre size is to check the sidewall of your current tyres.
Look for a code like this: 265/65R17 120S.
This code tells you everything you need to know to choose the correct replacement tyres.
What Do Tyre Size Numbers Mean?
Let’s break down a typical tyre size: 265/65R17.
Understanding these numbers helps you choose the correct tyre size and ensures a proper fit for your vehicle.
The tyre load rating appears alongside the tyre size as part of a code such as 120S.
The load rating indicates the maximum weight each tyre can safely carry. Choosing the correct load rating is essential, especially for vans, pickups, and vehicles carrying heavy loads.
Using tyres with an incorrect load rating can:
For example, a tyre with a load rating of 120 can carry up to 1400kg per tyre.
To find the correct load rating for your vehicle, check your current tyres or consult your vehicle handbook.
Use the table below to convert load ratings to the maximum weight per tyre:
Learn more in our tyre load-rating guide >
| Load index no. | Max tyre load (kg) | Load index no. | Max tyre load (kg) |
|---|---|---|---|
| 62 | 265 | 95 | 690 |
| 63 | 272 | 96 | 710 |
| 64 | 280 | 97 | 730 |
| 65 | 290 | 98 | 750 |
| 66 | 300 | 99 | 775 |
| 67 | 307 | 100 | 800 |
| 68 | 315 | 101 | 825 |
| 69 | 325 | 102 | 850 |
| 70 | 335 | 103 | 875 |
| 71 | 345 | 104 | 900 |
| 72 | 355 | 105 | 925 |
| 73 | 365 | 106 | 950 |
| 74 | 375 | 107 | 975 |
| 75 | 387 | 108 | 1000 |
| 77 | 412 | 110 | 1060 |
| 78 | 425 | 111 | 1090 |
| 79 | 437 | 112 | 1120 |
| 80 | 450 | 113 | 1150 |
| 81 | 462 | 114 | 1180 |
| 82 | 475 | 115 | 1215 |
| 83 | 487 | 116 | 1250 |
| 84 | 500 | 117 | 1285 |
| 85 | 515 | 118 | 1320 |
| 86 | 530 | 119 | 1360 |
| 87 | 545 | 120 | 1400 |
| 88 | 560 | 121 | 1450 |
| 89 | 580 | 122 | 1500 |
| 90 | 600 | 123 | 1550 |
| 91 | 615 | 124 | 1600 |
| 92 | 630 | 125 | 1650 |
| 93 | 650 | 126 | 1700 |
| 94 | 670 |
The tyre speed rating appears as a letter at the end of the tyre code, for example, 120S.
The speed rating indicates the maximum speed a tyre can safely handle.
Using tyres with an incorrect speed rating can:
For example, a tyre with an S rating is approved for speeds up to 112 mph.
To find the correct speed rating for your vehicle, check your current tyres or consult your vehicle handbook.
Use the table below to understand speed ratings and their maximum limits:
Higher-performance vehicles require tyres with higher speed ratings to ensure safe handling at high speeds.
| Speed rating | Max speed (mph) |
|---|---|
| N | 87 |
| P | 93 |
| Q | 99 |
| R | 106 |
| S | 112 |
| T | 118 |
| U | 124 |
| H | 130 |
| V | 149 |
| Z | 150 |
| W | 168 |
| Y | 186 |
While most tyres follow a standard metric format, there are exceptions.
Classic 4×4 & Land Rover tyres: These are often listed in imperial sizing, such as 6.00/16 or 7.50/16.
The second number (16) is the rim diameter in inches, while 6.00 or 7.50 indicates the tyre width in inches.
Large off-road tyres: Oversized off-road tyres are often shown in inch sizing, such as 40/13.5R17.
The first number (40) is the overall tyre diameter in inches, the second (13.5) is the width, and the final number (17) is the wheel size.
Understanding these formats is important when selecting tyres for classic vehicles or off-road builds.
Find the Right Tyres for Your Vehicle
Choosing the correct tyre size ensures a safe fit, proper handling, and optimal performance. Whether you’re replacing worn tyres or upgrading your setup, the right size makes all the difference.
Browse tyres by size, or use our registration lookup tool to find the right fit for your vehicle. Expert advice is available to help you choose with confidence.
Use our search tool above to find tyres for your vehicle by size or registration, with fast UK delivery or professional fitting available.
