Type
The type determines the installation location for which the tire is designed. Different installation locations require different characteristics, which are taken into account in the design accordingly. It is impossible to violate the type compliance - this leads to undesigned loads, which increase tire wear and can even lead to such a dangerous incident as a tire “explosion”.
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Steering. Tires designed for installation on the steering axle of a truck. In this place, the wheels and tires are subject to additional torsional loads along the vertical axis (when the steering wheel is turned from side to side), which places increased demands on reliability.
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Presenter. Tires designed for installation on the drive axles of a truck, for which good grip on the road surface and high resistance to torsional loads along the main axis of rotation are extremely important.
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Trailed. This category includes tires intended exclusively for installation on trailers (as well as on other axles other than steering or drive axles) and not suitable for any other use. With this setup, torsional loads are relatively low, but the tire is often subject to heavy weight loads (for example, in tractor-trailers, most of the weight is carried by the trailer).
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Universal. Tires that allow any of the installation options de
...scribed above. This option is convenient because by purchasing a set of tires of one model, you can provide them to all the wheels of the truck at once, without purchasing other tires. On the other hand, at the same cost, universal tires are often inferior to specialized tires in terms of performance characteristics.
— Steering / trailed. Tires best suited for use as either steering or trailing tires. See above for more details on each of these options.Aspect ratio
Tyre profile height. This indicator determines how much the tyre protrudes above the disk. Specifies the profile height as a percentage of the width (see above). The lower the profile, the better the stability of the car on the road and the faster the rubber wears out; in turn, higher profiles are well suited for rough roads, primers and off-road.
In truck tyres, there are such options for profile height:
40%,
45%,
50%,
55%,
60%,
65%,
70%,
75%,
80%,
85%,
90%,
95%.
Speed rating
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).
Fuel efficiency
The rolling resistance index to which the tire corresponds. The higher this indicator, the lower the resistance, the less fuel is spent on overcoming it and the more economical the tire is. Efficiency indices are designated by letters of the Latin alphabet in order of decreasing efficiency: from A to G (lowest efficiency).
All other things being equal, more economical tires (
A,
B,
C,
D) tend to cost more, but this difference is offset by fuel economy.
Wet grip
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.
Noise level
The average noise level generated by a tyre while driving. The lower this indicator, the more comfortable this model will be, the less additional noise it will create.
