![]() When a conscious decision is made to mount a different size (eg when choosing larger rims or a smaller winter wheel set), care must be taken to ensure that the static rolling circumference remains the same. The speed encoding and load index may deviate, as long as care is taken not to fall below the minimum. The same tire size should always be mounted as it came from underneath. The weights are in kg and the speeds in km/h. The tables below show the load index (capacity index) and the speed coding. According to the law, tires with a lower speed code may never be fitted than the maximum speed of the car, even if the driver always drives calmly and never faster than 120 km/h. V = Speed coding (the maximum allowed speed for the tire). The load capacity must always be equal to or higher than the weight that the car may be fully loaded. Nowadays, due to the firmness of the tire, only radial tires are used in passenger cars.ġ6 = Inch of the rim around which the tire goes.ĩ1 = Load index (the maximum weight allowed on the tire). R = Radial tire (there are radial tires and diagonal tires). This means that if the width of the profile is 20,5 cm, the height of the sidewall is 55%, so it is 11,2 cm high. Here is mentioned as an example a tire with the size 205/55 R16 91vĢ05 = the width of the tread in mm (ie 20,5 cm wide).ĥ5 = the height/width ratio of the sidewall of the tire to the width of the profile (the height of the sidewall of the tire is 55% of the width of the tread).
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