Tyre Size Calculator

Use Tyroola's tyre calculator to find substitute tyre sizes for your vehicle if you're looking for a change.

It will help you avoid speedometer errors since its accuracy is directly affected by tyre size. Upsizing or fitting taller / larger tyres will reflect a slower speedometer reading than your actual speed.

Look at your existing tyres and enter their size into the calculator. Do the same for another set you want to compare them with.

To find alternative tyres, simply click on each size to see what Tyroola has available.

You can use it for a wide variety of tyres including street, racetrack, trailer, spare, off-road and even extreme mud-terrain tyres.