Quick answer: Your tyre size is moulded into the markings on the sidewall of the tyre. It is made up of 5 different pieces of information in the following order:
Example metric tyre size: 234/30 R19 91Y
- Tyre width (usually a 3-digit number)
- Aspect ratio/height (usually a 2-digit number)
- A single letter that represents the construction method (usually R)
- Tyre/rim diameter in inches (usually a 2-digit number)
- The load index and speed index (usually a 2-digit number followed by a single letter)
Reading and understanding passenger car tyre sizes may seem daunting at first, but it’s actually quite simple once you know what all the numbers and letters mean.
Where to Find Your Tyre Size
- Check tyres sidewall ( if that does not work step 2)
- Check placard Drivers door jam.
- Vehicle logbook.
- If you unser, send an enquiry to via Auto Hero and a local tyre shop will help you
Tip:
- Remember, some cars have different size tyres front and rear, so it pays to check all four tyres.
- It’s better to read them from the tyres directly. This is because different wheels or tyres could be fitted—either by the factory, the dealership, or previous owners.
I Still Need Help!
Don’t worry if you haven’t quite worked it out – lots of workshops will even just recommend that you send a quick picture of the tyre if you’re not sure. Send through a tyre quote now and Our tyre specialists will walk you through everything you need to know.
Written By
Matt Banks
Matt is the founder of Autohero.com.au and has been hooked on cars and repairs ever since childhood. A veteran in automotive since leaving school, Matt has completed his trade as a panel beater and is across all things with wheels.
His first car was a 1967 FORD XR Wagon followed by a string of collectable Holden’s.
Have a question for Matt? leave a comment below.
This is very useful information