You will find a short explanation below of the different elements that make up the tyre designation and what the individual numbers and letters signify.

What does 235/45 ZR 17 94W actually mean?

235 - Tyre width in millimetres

45 - Height to width ratio as a percentage

R - Code for the tyre design (R = Radial tyres)

17 - Rim diameter in inches

94 - Load Index (indicates the load capacity of your tyre)

W - Symbol for the approved maximum speed (V = up to 240 km/h - 150 mph, W = up to 270 km/h - 168 mph, ZR as part of the size designation = over 240 km/h - 150 mph)

Other designations:

rf - reinforced

XL - Extra Load (for specially reinforced tyres)M+S - special designation for winter tyres (Slush and Snow)