This parameter is indicated for models that are designed for a specific format of operation and differ markedly from conventional tyres for "everyday" use. In our time, there are such destinations:
sports track tyres(namely, semi-slicks and slicks for track days and training on race tracks); off-road tyres - all-
terrain (All-Terrain) and
off-road (Mud-Terrain). Here is a detailed description of each of these options:
— Sports track. A special kind of "high-speed" tyres with a reduced tread depth. More precisely, this feature is characteristic of semi-slicks; in slicks, there is no pattern at all, the surface of such a tyre is completely smooth. This provides excellent speed performance. On the other hand, slicks and semi-slicks are intended mainly for specialized racing tracks with high quality even surfaces; the use of such tyres on ordinary roads is at least not recommended, and for some models it is completely prohibited.
- All-terrain (All-Terrain). Universal all-terrain tyres, designed mainly for dirt roads and off-road, but quite effective on even asphalt. They are inferior to off-road ones (see below) in terms of efficiency on rough terrain, but they behave better on hard surfaces. So it is precisely such rubber that will be the best choice for tech who, in addition to difficult terrain, often have to travel on ordinary roads. Externally, tyres o
...f this purpose are characterized primarily by a rather deep tread and high profile.
- Off-road (Mud-Terrain). Tyres designed for maximum cross-country ability and efficiency on rough terrain, including complete off-road. According to these indicators, such tyres are noticeably superior to all-terrain tyres (see above); outwardly, it is distinguished by a very deep tread and a high profile height (in most models - 60% and above). But for regular driving on asphalt, tyres of this purpose are poorly suited. Therefore, paying attention to off-road tyres makes sense, first of all, to tech who have to drive on dirt roads and off-road most of the time.The speed rating that the tyre corresponds to.
This indicator determines the maximum speed that tyre is allowed to operate. It is designated by the letters of the Latin alphabet, each of which corresponds to a certain speed limit:
F — 80 km/h; G — 90 km/h; J — 100 km/h; K — 110 km/h; L — 120 km/h; M — 130 km/h; N — 140 km/h; P —
150 km/h ; Q —
160 km/h ; R —
170 km/h ; S —
180 km/h ; T —
190 km/h ; U —
200 km/h ; H —
210 km/h ; V —
240 km/h ; W —
270 km/h ; Y —
300 km/h ;
The maximum permitted speed must not be exceeded — this creates the risk of an accident. However, there are other rules associated with choosing a tyre by this factor. So, ideally, the actual driving speed should be at least 10 – 15% lower than the speed rating of the installed tyres — this will give an additional guarantee in case of emergency situations. In addition, in some tyre models, as the speed approaches the maximum, the upper limit of allowable load is reduced; see “Load Index” for details.
