Those numbers on the sidewall of your tyre can look confusing. We break down exactly what 205/55 R16 91V means so you can order the right tyre every time.
The string of numbers and letters embossed on your tyre sidewall looks confusing at first glance, but each element carries specific information about the tyre's dimensions, load capacity and performance rating. Understanding these markings ensures you always order the correct replacement.
1Width, Aspect Ratio and Rim Diameter
In a size like 205/55 R16, the first number (205) is the tyre width in millimetres. The second number (55) is the aspect ratio — the sidewall height expressed as a percentage of the width. R16 means the tyre fits a 16-inch diameter rim.
2Load Index
The load index is a number indicating the maximum weight each tyre can safely carry. A load index of 91 means 615 kg per tyre. Always match or exceed the load index specified by your vehicle manufacturer — fitting an under-rated tyre is dangerous.
3Speed Rating
The speed rating letter follows the load index. V means the tyre is rated to 240 km/h, W to 270 km/h and Y to 300 km/h. Never fit a tyre with a lower speed rating than the manufacturer specifies for your vehicle.
4Where to Find Your Correct Size
Your vehicle's correct tyre size is listed in the owner's manual and on a sticker inside the driver's door frame. Always use the manufacturer-specified size — incorrect dimensions affect handling, speedometer accuracy and fuel economy.
When you book with Bradford Mobile Tyres, simply provide your vehicle registration and we will identify and source the correct tyre for your car automatically.
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