Understanding Tyre Sizes: A Comprehensive Guide

Knowing your correct tyre size is essential for safety, comfort, and performance. You can find this information printed on the sidewall of the tyre — that’s the outer edge of the tyre.

👉 Example: 205/55 R16 91V

This combination of numbers and letters tells you everything about the tyre’s width, height, construction type, rim diameter, load index, and speed rating.

Where to Find Your Tyre Size

Finding your tyre size is straightforward. Look for the markings on the sidewall. This is where all the important information is located. If you can’t find it, don’t worry! You can also check your vehicle’s manual or consult a tyre specialist.

What Each Part of the Tyre Size Means

Let’s break down the example 205/55 R16 91V step by step:

205 – Tyre Width (in millimetres)

This number shows the total width of the tyre, measured from one sidewall to the other. In this example, the tyre is 205 mm wide.

👉 Wider tyres provide better grip but can increase fuel consumption slightly.

55 – Aspect Ratio (Height as % of Width)

This number represents the ratio between the tyre’s height and width. In this case, the height is 55% of 205 mm, which equals about 112 mm.

👉 A smaller aspect ratio means a lower profile tyre, improving stability but reducing comfort.

R – Tyre Construction Type

The letter R means radial construction, which is the standard for modern tyres.

👉 Radial tyres offer better durability, stability, and road contact.

16 – Rim Diameter (in inches)

This shows the internal diameter of the tyre, which must match your wheel size. In this case, it fits a 16-inch rim.

91 – Load Index

The load index indicates the maximum weight capacity per tyre. In this example, 91 = 615 kg per tyre.

👉 Always check the manufacturer’s load index table to confirm the exact value.

V – Speed Rating

This letter indicates the maximum safe speed for the tyre. In this case, V = up to 240 km/h.

👉 The tyre’s speed rating must be equal to or higher than the one recommended in your vehicle’s manual.

Other Important Tyre Markings

Besides the size, you’ll find other useful markings:

• M+S: suitable for mud and snow (Mud + Snow).

• 3PMSF: symbol of a mountain with a snowflake – approved for winter conditions.

• DOT: manufacturing code showing week and year of production (e.g., DOT 2323 → 23rd week of 2023).

• OUTSIDE / INSIDE: indicates correct tyre mounting direction.

  
  

How to Check Your Vehicle’s Recommended Tyre Size

You can also find your vehicle’s original tyre size in several places:

• In the owner’s manual.

• On the driver’s door frame label or fuel cap sticker.

• On the manufacturer’s website or by consulting a tyre specialist.

  
  

👉 Using incorrect tyre sizes can affect stability, braking, fuel efficiency, and even ABS or ESP systems.

The Importance of Choosing the Right Tyres

Choosing the right tyres is crucial for your vehicle's performance. The right tyres enhance safety, improve handling, and ensure a comfortable ride.

Safety First

Safety should always be your top priority. Tyres that are not suited for your vehicle can lead to accidents. They can also wear out faster, costing you more in the long run.

Comfort and Performance

The right tyres provide a smoother ride. They also improve fuel efficiency. This means you save money at the pump while enjoying a comfortable journey.

Seasonal Considerations

Different seasons require different types of tyres. Winter tyres are designed for cold, icy conditions. Summer tyres perform better in warm weather. All-season tyres offer a compromise, but they may not excel in extreme conditions.

Brugge Banden Mobiel – Your Tyre Specialist in West Flanders

At Brugge Banden Mobiel, we help you identify the correct tyre size and choose the best options for your vehicle. We work with leading brands like PointS, Michelin, Goodyear, Yokohama, Vredestein, and Apollo, offering professional mobile tyre fitting throughout Bruges and West Flanders.

📞 0498 60 05 76

✉️ bandenmobiel@gmail.com

🌐 www.bruggebandenmobiel.be

👉 Book your tyre fitting or size check today. Safety starts with the right tyres — and we bring the service to your doorstep.

Conclusion

Understanding tyre sizes is essential for every car and van owner. It ensures safety, enhances performance, and provides peace of mind. If you have any questions about your tyres, don’t hesitate to reach out. We’re here to help you make the best choices for your vehicle.