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On olemas kolm eri tugevusega linti mis peale vulgitakse. Põhja-, kesk-, ja lõunaeuroopa jaoks.
Ja kui juba selline lint on olemas miks ei või tehas lasta sellise erinevusega rehve välja. 
Eristamiseks piisab ehk ühest tähest pikas numbrite rivis. Või siis tuleb maitsta ise järgi

Seda näitab TW indeks. Mitte segi ajada TWI märgisega, mis näitab kulumisindikaatori asukohta. Mis ühel normaalsel talverehvil on kaheastmeline.

Netist varastatud teadmine:

TREADWEAR 
To explain treadwear better, let’s start with the concept of a reference tyre. It is a standardised model with parameters that correspond to the TREADWEAR 100 index. Tyres introduced to the market may be marked with a TREADWEAR index that is a multiple of 20 (60 - 80 - 100 - 120 - ... 200 ... 800).
How is the index assigned? A test is carried out under controlled conditions on a route with a distance of 6,400 miles (approx. 10,300 km) at Goodfellow Air Force Base in San Angelo, Texas. The tested tyre is mounted onto a special vehicle with tyres having a 100 index. Then the tyre wear is measured.
The measurement is carried out every 800 miles (1287 km) and the tyres are accordingly re-installed (on a rotational basis). Based on the measurement results, the tyres are marked with indexes: 60, 100, 200, or 400.
If the tyre gets an index of 60, its theoretical service life is equal to 60% of the service life of the reference tyre (index 100). As a result, a tyre with an index of 60 will wear almost two times faster than a tyre with an index of 100. In turn, a tyre with index 200 will wear down two times slower than the reference tyre, but two times faster than the tyres with index 400. A model with index 400 will be four times more durable than the reference product (index 100).

TRACTION
Traction in UTQG markings is expressed with letters. AA is the highest rating, followed by A and B, whereas C is the lowest value. This marking informs the driver about the ability of stopping the car on wet surfaces.
Determining the TRACTION parameter takes place on an asphalt or concrete track in strictly defined conditions. The test car accelerates to a speed of 65 km/h and then the brakes are activated. During the test the ABS system in the vehicle is turned off.

In Europe, the lowest acceptable value of TRACTION is A. If you prefer a dynamic and aggressive driving style, try to find tyres marked with AA index. Indexes B and C are only acceptable in the USA and it’s advisable not to have such tyres in Europe. It should also be noted that the TRACTION marking does not provide information about grip on dry roads, cornering or resistance to aquaplaning.

TEMPERATURE
The last of UTQG markings is TEMPERATURE - it specifies the resistance of the tyre to overheating generated while driving. When driving at high speeds, the tyre heats up intensely and that may shorten its operational life. 
In order to assign the index (A, B or C, where A is the best value) a laboratory assessment is performed. It includes a series of tests. As resistance to overheating is closely related to speed, to be awarded with Index A, the tyre must withstand a 30-minute test at the speed of 115 miles/hour (185 km/h). Index B requires a 30-minute test at a speed of 100 miles/hour (160 km/h), whereas Index C requires this test at a speed of 85 miles/h (137 km/h).
TRACTION (grip) and TEMPERATURE (resistance to overheating) markings, in Europe should have the A value at least. The TREADWEAR marking (wear resistance) will help you to select tyres that have a longer service life.
If you want to base your choice on these markings, remember that the difference between a tyre with an index of 200 and 400 will be significant. UTQG markings should be considered as purely demonstrative. There is no obligation to use them in Europe, and the values are determined in the conditions of North America.

https://www.oponeo.ie/blog/car-tyre-mark...lete-guide