There are two different sets of labels for car tyres. The first is the information printed on the sidewall of the tyre. This code is to identify the size and specification of the tyre in question and to signify that it holds up to European standards. Looking at the code from a popular size of tyre we see the code 205/55R16 91V. This code holds information about the proportions and construction of the tyre and also the maximum speed and load capacity. 205 refers to the nominal section width of the tyre, with 55 being the aspect ratio representing the height of the sidewall as a percentage of the nominal section width. The letter indicates the construction, in this case R for radial, with the following number indicating the diameter of the interior rim in inches, here it is 16 inches. The next number refers to the load capacity and the letter indicates the maximum speed at full load, here it is 150mph.
The other type of labelling is there to help drivers make more informed choices when buying tyres. There are two ratings on a scale of A (the best) to G (the worst) for rolling resistance and wet grip. There is also a rating for tyre noise, indicating whether the tyre is quieter than EU regulations. This labelling is far from comprehensive and it’s best to check reviews online for better information.
