The right variat how to read the tyres data:

USEFUL INFO 

Typical size

It is written on the sidewall of the tire. For example: 195/65 R 15 91T

195 — tire width in millimeters.

65 — the percentage of the tire section height to its width. This parameter determines the height of the tire at a given tire width: 195*065=126,75 millimeters.

R — means the tire structure (radial). Many motorists mistakenly think that the R – means the radius of the tire, and then follow the numbers that means the diameter of the tire.

15 — the internal diameter of the tire and not the radius.

91 — index of the maximum load on the tire.

T — the speed index.

Also, can be the following parameters:

С — indicates that the tire is classified as reinforced.

M+S — denotes the tire with raised passableness.

TL (TubeLess) — tubeless tire.

ТТ (Tube Type)— tube tire.

XL or Extra Load — reinforced tire, load index which is higher than 3 units, than normal tires of the same size.

All Season or AS — all season tire.

Aw (Any Weather) — any weather tire.

Aquatred, Aquacontact, Rain, Water, Aqua or icon (umbrella) — special rain tires..

Outside and Inside — asymmetric tire. Installation Outside label must be on the outside of the vehicle, and Inside - Internally.

RSC (RunFlat System Component) —RunFlat tires — tires, where you can continue to drive the vehicle at a speed of 80 km/h at a total pressure drop in the tire (puncture or cut). In these tires, depending on the manufacturer's recommendations, it is possible to pass from 50 to 150 km.

Different manufacturers use different notations on tire technology RSC. For example:: BBridgestone RFT, Continental SSR, Goodyear RunOnFlat, Nokian Run Flat, Michelin ZPetc.

Rotation or the marking arrow on the sidewall of the tire is directional tire. When installing the tires need to strictly abide by the direction of wheel rotation indicated by the arrow.

Max Pressure — maximum permissible tire pressure in kPa.

Max Load — maximum load on each wheel, in kg.

Reinforced or RF in the size (for example 195/70 R15RF) means that the tire is reinforced (6 layers). The letter C at the end of tire size (eg 195/70 R15C) denotes the cargo tire (8 layers).

Radial marking on the tire size means it a radial tire.

Steel means that there is a metal structure of the tire cord.

Letter E (in the circle) — the tire conforms to European standards ECE (Economic Commission for Europe).

DOT (Department of Transportation — U.S. Department of Transportation) - U.S. quality standard.

Temperature А, В or С — heat resistance of tires at high speeds on a test stand (A - best).

Traction А, В or С - the tire's ability to brake on a wet road surface.

Treadwear — the expected path of the mileage compared with the special standard test U.S.

Often on the tires is indicated the date of production in the format week-year. For example: 2812 - twenty-eighth week of 2012.