How do tyre sizes work?Updated 3 months ago

Here's a step-by-step guide to help you understand how tyre sizes work. 

1. Width: The initial set of numbers denotes the width of the tyre, measured from tread to sidewall in millimetres. Example: 205 = 205mm

2. Profile: The next two numbers represent the tyre's profile, indicating its height as a percentage of the width. Example: 55 = The height is 55% of the tyre's width.

3. Rim Size: The wheel size is composed of two components.

   • R = Tyre Construction: Denoting a radial ply construction, which is standard for car tyres.
   • 16 = Rim Diameter: Indicates a 16-inch rim.

4. Load: The load index is a numeric value indicating the tyre's maximum load capacity. Different tyres have varying load indexes to accommodate a range of vehicle weights. Example: 91 = Load index

5. Speed: The speed symbol signifies the tyre's speed capability. It is crucial to match the speed symbol with the intended vehicle use to ensure safe operation. Example: V = Speed Symbol

See the full article on finding your tyre size here