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.The load index characterizes the maximum weight under which the tyre can be safely operated. As in the case of the speed rating described above, this indicator cannot be exceeded, otherwise unpleasant consequences are possible, up to accidents. Also note that when selecting according to the load index, it is worth considering the distribution of weight along different axes of the vehicle. And it is worth considering the maximum possible weight when the truck is loaded, in accordance with what to select
truck tyres for heavy loads.
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).
