Fitting the correct tyre size is crucial for your vehicle’s safety and performance. You can find your car’s tyre size information in the following places:
Vehicle owner’s manual
Tyre information placard on the driver’s side door jamb
Sidewall of your current tyres
The tyre size is typically represented by a series of numbers and letters, such as 225/55R16. Each part’s meaning is explained as follows:
225: This is the tyre’s width in millimetres, measured from sidewall to sidewall. Think of it as the tyre’s waistline. 55: This is the aspect ratio, expressed as a percentage. It tells you how tall the tyre’s sidewall is compared to its width. In this case, the sidewall height is 55% of the tyre’s width. A lower number means a shorter sidewall, while a higher number indicates a taller sidewall. R: This letter stands for radial construction, which means the tyre’s internal layers run radially across the tyre from bead to bead. Radial tyres are the most common type used on modern vehicles. 16: This number represents the diameter of the wheel rim in inches. It tells you the size of the wheel your tyre is designed to fit.