Introduction:
Understanding the numbers and letters on your vehicle's tyres can be like deciphering a secret code but fear not! In this guide, we'll break down the components of a tyre size to empower you with the knowledge to make informed decisions about your vehicle's rubber. Let's dive into the intricacies of width, side profile, rim size, load index, and speed rating.

1. Width:
   The first number in your tyre size represents its width, measured in millimetres. For example, in the size "215/60R16," 215 indicates the tyre width from sidewall to sidewall. A wider tyre typically provides better traction and stability, but it's essential to adhere to the manufacturer's recommendations for your specific vehicle.
2. Side Profile:
   Following the width, you'll find a two-digit number that represents the aspect ratio or the sidewall height as a percentage of the tyre's width. In the example "215/60R16," the side profile is 60, indicating that the sidewall height is 60% of the tyre's width. A lower aspect ratio often means better handling, but it may result in a firmer ride.
3. Rim Size:
   The last number in the sequence denotes the diameter of the wheel rim, measured in inches. Using our example, "215/60R16," the rim size is 16 inches. Ensure that the tyre size matches the recommended rim size for your vehicle, as it directly impacts the overall performance and safety.
4. Load Index:
   The load index is a numerical code indicating the maximum weight a tyre can support. This figure can be found following the tyre size. Here's a table defining the different possible load indexes for both standard and light commercial vehicles:
   Load Index for Standard Vehicles:

Load Index for Light Commercial Vehicles:

Load Index for Light Commercial Vehicles:

It's crucial to choose a load index that meets or exceeds your vehicle manufacturer's specifications to ensure safety and optimal performance.

5. Speed Rating:
   The speed rating, represented by a letter following the load index, indicates the maximum speed a tyre can sustain under optimal conditions.
   Here's a table defining each possible speed rating and their corresponding maximum speed limit:

Remember to match the speed rating with your vehicle's specifications, and always prioritise safety when selecting tyres.

Conclusion:

Now equipped with the knowledge to decipher tyre sizes, you're ready to make informed choices that contribute to both safety and performance on the road. Should you find yourself in need of expert guidance or personalised assistance in selecting the perfect tyre for your vehicle, look no further than Stevenage Tyres. Our specialists are ready to answer your questions, provide recommendations, and ensure you drive away with the confidence that comes from having the right rubber beneath you. Whether you prefer to call or visit us in person, our team is dedicated to helping you navigate the world of tyres and keeping your journey smooth and secure.

Trust Stevenage Tyres for all your tyre needs because your safety and satisfaction are our top priorities.

Safe driving!