Home › Guides › How to read your tyre size
How to read your tyre size
Some links here are affiliate links: we may earn a small fee if you buy, at no extra cost to you.
The size is moulded into the sidewall of every tyre. A typical one reads 205/55 R16 91V.
- 205: the width of the tyre in millimetres
- 55: the height of the sidewall as a percentage of the width (the aspect ratio)
- R: radial construction, which almost all modern car tyres use
- 16: the rim diameter in inches
- 91: the load index, how much weight each tyre can carry
- V: the speed rating, the maximum speed the tyre is designed for
Where to find it
Look at the sidewall, in the owner's handbook, or on a sticker inside the driver's door or fuel flap. Use the size the manufacturer lists for your car unless a fitter advises otherwise.
Do not guess
If you are unsure, include your car make, model and year in the enquiry and the fitter can confirm the size before they come out.
Compare tyres and book fitting at a local garage on Tirendo. Useful if you would rather buy online and have them fitted at a garage near you.
Need help?
Use the form to send a free enquiry. We'll pass it to an independent local mobile tyre fitting provider.