Need new tyres but not sure what size you need? You’re not alone: most drivers have never looked. The good news is that it only takes a minute to find, and if you’re stuck, we’re happy to help.
Where to find your tyre size
- On the tyre itself. Look at the sidewall (the side of the tyre) for a code like 205/55 R16 91V. It’s moulded into the rubber, usually in slightly larger characters than the rest of the text.
- On the tyre placard. Many cars have a sticker inside the driver’s door frame or fuel filler flap showing the recommended tyre sizes and pressures.
- In your vehicle handbook. The specifications section lists the tyre sizes approved for your car.
Still not sure? Call or WhatsApp us
Get in touch with your registration number by phone or on WhatsApp and we’ll help you find the right tyre size for your car.
What the numbers mean
Using 205/55 R16 91V as an example:
- 205 is the tyre’s width in millimetres, measured from sidewall to sidewall.
- 55 is the profile (or aspect ratio). The sidewall height is 55% of the tyre’s width.
- R means radial construction, which almost every modern car tyre uses.
- 16 is the wheel (rim) diameter in inches, so this tyre fits a 16-inch wheel.
- 91 is the load index: the maximum weight each tyre can carry. 91 means 615kg per tyre.
- V is the speed rating: the maximum speed the tyre is designed for. V means up to 149mph (240km/h).
Why getting the right size matters
Fitting the wrong size can affect your car’s handling, braking and speedometer accuracy, and it could cause problems with your insurance. Replacement tyres should match the size your car was designed for, with a load index and speed rating at least as high as the manufacturer recommends.
Other markings you might spot
- XL or Reinforced: an extra load tyre, designed to carry more weight.
- M+S or a three-peak mountain snowflake: tyres designed for mud and snow, or certified for winter conditions.
- Run-flat markings (such as RFT, ROF or SSR, depending on the brand): tyres that can be driven a limited distance after a puncture.
- DOT code: the last four digits show when the tyre was made. For example, 2324 means week 23 of 2024.
Check all four tyres
Some cars use different sizes on the front and rear, so check each tyre, or let us check them for you.
Need new tyres?
We keep lots of tyre sizes in stock, from budget to premium. No appointment needed: just drive in to 45 Carlisle Street, Leicester, or get a quote online with your tyre size and reg and we’ll do the rest.
