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Tyre advice

How to read your tyre size: 205/55 R16 91V explained.

Width, profile, rim size, load index and speed rating, decoded in plain English.

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MODS Mobile Tyre Service3 min read

Every tyre has its size printed on the sidewall. Knowing it saves time when you call for a new tyre, and makes sure you get the right one.

Look at the side of your tyre and you will see a code like 205/55 R16 91V. Here is what each part means.

The code, piece by piece

  • 205 is the tyre width in millimetres.
  • 55 is the profile: the sidewall height as a percentage of the width.
  • R means radial construction, which almost every car tyre is.
  • 16 is the rim size in inches.
  • 91 is the load index: how much weight each tyre can carry.
  • V is the speed rating: the maximum speed the tyre is built for.

Where else to find your size

  • On a sticker inside the driver's door frame or fuel filler flap.
  • In your car's handbook.

Does the size have to match exactly?

Width, profile and rim size should match what your car is designed for. The load index and speed rating should be the same or higher. Tyres on the same axle should match each other.

Not sure? Send a photo

The quickest way is to take a clear photo of the tyre wall and send it to us on WhatsApp. We will confirm the size and give you a price for a new or part-worn tyre, fitted where you are.

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We come to you 24/7 across Dublin, Kildare, Meath and Wicklow.

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  2. 02

    Tell us the problem

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    Send a photo on WhatsApp
    Where is my tyre size?
    205/55 R16 91VWidthTyre width in mmProfileSidewall height %Rim sizeWheel size in inchesLoad & speedLoad & speed rating

    It is printed on the side of your tyre, e.g. 205/55 R16 91V. Send us a photo of it.

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  4. 04

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Not sure of your tyre size? Tap to see where to find it
205/55 R16 91VWidthTyre width in mmProfileSidewall height %Rim sizeWheel size in inchesLoad & speedLoad & speed rating

It is printed on the side of your tyre. Not sure? WhatsApp us a photo and we will check it for you.

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FAQ

Quick answers.

Anything else? Call us. A real person answers, day or night.

What does R16 mean on a tyre?

R means radial construction and 16 is the wheel rim diameter in inches.

Can I fit a different tyre size?

Stick to the sizes approved for your car. The wrong size can affect handling, speedometer readings and insurance.

Where is the tyre size on my car?

On the tyre sidewall, the sticker in the driver door frame, or in the handbook.

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