The speed rating describes the maximum speed at which a given tyre can be safely driven. It is worth choosing a model according to this parameter in such a way that during operation it is not allowed to exceed the speed rating — this creates increased loads on the tyre and can lead to its damage (up to an “explosion”). And it is best to choose an option with a margin of at least 10 – 15 km/h — this will give an additional guarantee in case of emergency situations. For truck tyres, speed indices in the range of 100 – 130 km/h are considered popular, and these are
the J speed rating(100 km/h),
the K speed rating(110 km/h),
the L speed rating(120 km/h) and
the speed rating M(130 km/h). For agricultural machinery, the speed is much lower:
index A6(30 km/h),
index A8(40 km/h),
index B(50 km/h),
index D(65 km/h),
index F(80 km/h) ). There are also
high-speed truck tyres and less popular
speed indices C(60 km/h),
E (70 km/h) and
G (90 km/h).
An index that determines the overall performance of a tire on wet asphalt. Identified by letters from
A(highest) to G (lowest).
The higher this indicator, the stronger the tire “clings” to the wet road, the more efficient and safer it will be in bad weather, all other things being equal. It is worth noting that a low clutch index (E, F, G) does not mean that it is unsuitable for driving in rain or snow - you just need to be more careful on such tires. Conversely, a high index (A,
B,
C,
D) does not relieve the driver of the need to be careful in difficult weather conditions.
