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tire size speedometer calculator
The speed class of a tire refers to a maximum speed carrying a specified load under specified conditions. Therefore, in the 1960s, the regulations on tire speed level were put forward. Now most tires are basically marked between S and y, that is, within the specified range of 180 km / h and 300 km / h.
Tire speed class refers to the maximum speed at which the tire carries the specified load under the specified conditions. The sidewall of each tire will be marked with various parameters of the tire, such as tire size information, bearing grade, speed grade, etc. The size information is intuitive and can be read directly, but the speed level is expressed in English letters, which represents the certified speed level of tires from 4.8 km / h to 300 km / h, which needs to be mapped one by one according to the letters in the tire speed level comparison table.
Find the maximum speed represented by the tire speed level comparison table. From the figure, we can know that the maximum speed of the tire represented by "W" is 270km / h, that is, the driving speed of the vehicle can not exceed 270km / h. If speeding, it will aggravate the tire wear and increase the probability of tire burst, which is very dangerous. Remember, the driving speed must not be higher than the maximum speed of the tire.
"94" in front of "W" represents the above-mentioned bearing grade, which represents the maximum upper limit load of the tire. It also needs to find out the maximum bearing grade of the tire according to the comparison table. The maximum load class has the same property as the tire speed class, that is, the driving speed or load should be based on them and should not be exceeded. If it is exceeded, there is a great potential safety hazard.
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