How to Read Your Car’s Tyre Size
Sending the tyre size before booking helps the team check stock and quote the right replacement. The sidewall contains several markings; the main size sequence is the most useful starting point.
An example: 225/45 R17 94W
In this example, 225 is the tyre width in millimetres. The 45 is the sidewall height as a percentage of the width. R describes radial construction, and 17 is the wheel diameter in inches. The remaining 94W identifies the load index and speed rating; these are part of the specification rather than optional extras.
Use the vehicle’s required specification
The replacement must meet the vehicle’s requirements. Check the handbook, tyre placard or an approved specification for your exact model. Some cars have different sizes at the front and rear; photographing just one wheel may not describe the whole set. Do not choose a tyre solely because it fits the rim.
Other useful markings
XL can indicate extra load capability, while markings for run-flat or manufacturer-approved versions may affect the correct choice. The production-date marking helps identify when the tyre was made, but age alone does not establish its condition. The team can interpret the markings with the vehicle details.
The photo that makes quoting easier
Take a clear photo of the full sidewall marking and send the make, model, year and the number of tyres required. If you are replacing a damaged tyre, include the damaged area and mention whether the car was driven while flat. State any brand preference, then confirm availability and the full quotation.
Pressure is a separate check
A size marking does not give the correct operating pressure for your car. Use the pressure specified for the vehicle and its load. Pressure, tread condition and visible damage should be checked regularly; a matching size does not make a worn or damaged tyre safe.
Need help in Dubai?
Share your vehicle details and location with Car Hero. We confirm the suitable service, availability and quotation before arranging the work.
General information; follow your vehicle handbook and obtain a professional assessment for a fault. Further reading: Michelin: tyre markings explained.