Ever wondered what those funny numbers on the side of your tyres mean? We at NamWheels love to help and give you a short explanation of what these digits stand for.
Example: 225/40 R 18 92 Y
225 = Nominal width of tyre, i.e. how wide the tread area or or road contact patch is in millimetres (here: 225mm)
40 = Aspect ratio, i.e. the ratio between the nominal width and the sidewall height as a percentage (here: 40%)
R = indicates radial construction
18 = Diameter of tyre’s inner rim in inches (also the rim size, here: 18 inches)
92 = Load capacity code, in this casemax. 630kg
Y = Max. Speed Rating, i.e. permissible speed, here 300km/h