When you look at the sidewall of your tyre, you’ll see a series of numbers and letters. At first, it may look confusing—but it’s actually a simple code that tells you everything about your tyre’s size, type, and performance.

Understanding this can help you choose the right tyres, improve your car’s safety, and drive with confidence.

Why Tyre Size Matters

The right tyre size affects:

  • Safety and braking distance
  • Fuel efficiency
  • Ride comfort
  • Handling and performance

Using the wrong size can reduce performance and even damage your vehicle.

Example: 205/55 R16 91V

Here’s what each part means:

  • 205: Tyre width in millimetres (sidewall to sidewall).
  • 55: Aspect ratio (the height of the sidewall is 55% of the width).
  • R: Radial construction (the most common type today).
  • 16: Rim diameter in inches.
  • 91: Load index (how much weight the tyre can carry).
  • V: Speed rating (V = up to 240 km/h).

Other Markings You May See

  • M+S: Mud and Snow suitable.
  • DOT code: Shows production date and batch.
  • Treadwear, Traction, Temperature: Indicators of durability, grip, and heat resistance.

Quick Tips for Car Owners

Always check your car’s manual or the sticker inside the driver’s door for the recommended tyre size.

Replace tyres in sets of four (or at least pairs) for balanced performance.

Pay attention to load index and speed rating, not just size.

Once you understand the code on your tyre, it becomes easy to read. This knowledge helps you make smarter choices when buying tyres, keeping your car safe and performing at its best.