Lowering the speed index

When selecting tires, it is essential to follow the recommended size. However, in addition to these basic parameters, there is also a speed index. It indicates the maximum speed at which the tire can be operated. How important is it to follow the recommendations for this indicator, and is it possible to install tires with a lower load index?

The speed index is displayed using Latin letters and indicates a specific speed. For example, "H" is 210 km/h, and "V" is 240 km/h. The tire is designed and constructed to withstand the permitted load at such a speed without failing.

To obtain this index, the tire manufacturer must undergo a special certification test. The tire is mounted on a special stand and accelerated to the required speed. After that, the automaker decides which speed index to recommend for installing tires on the vehicle. After all, the Mercedes-Benz G63 AMG will require tires with an index of over 300 km/h, while the Lada Granta will be suitable for tires with index T - 190 km/h. Therefore, when choosing tires, it is necessary to know the recommendations for your car, and it is best to buy tires with the same or higher speed index.

Some manufacturers allow lowering the speed index for winter tires because people drive slower in winter. However, if you want to take tires with a lower speed index despite the recommendations, you should always remember what tires are on your vehicle and adapt your driving style accordingly.