Audi A4

since 1994 release

Repair and operation of the car

A4 Audi
+ Running gear
+ Regular servicing
+ Engines
+ Turbo-supercharging
+ System of an exhaust
+ Cooling system
+ Fuel tank and fuel pump
+ Air filter and channels of absorption
+ System of injection
+ Coupling
+ Transmission and main transfer
+ Suspension bracket of wheels and steering
+ Brakes
- Wheels and tires
   Designations of tires
   Wide-profile tires and rims
   Check of pressure in tires
   Check of a condition of tires
   Replacement of wheels
   Check of durability of fastening of wheel bolts
   Unbalanced wheels
   Purchase of new tires
+ Electrotechnical equipment
+ System of ignition
+ Lighting
+ Alarm equipment
+ Tools and devices
+ Heating and ventilation
+ body Details
+ Salon
Search of malfunctions
Technical characteristics

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Designations of tires

Under the existing international agreements the size of tires is given in millimeters or, as in our case, in millimeters and in inches. Designations of 195/65 R 15 91 H or 205/60 R 15 90 V mean the following:

195 or 205: width of tires in not loaded mm fortune.

65, 60, 55: ratio of height of tires and their width = 65: 100, 60: 100 or 55: 100. Old radial tires which are not put on Audi A4 any more, have a ratio of height of tires and their width 80: 100. The ratio of height and width in tires with designation 65, 60 and 55 is respectively lower.

  1. max. loading
  2. vnutr. pressure
  3. layers
  4. sidewall
  5. protector
  6. check of DOT *
  7. manufacturer's code
  8. tire size code
  9. tire code (on a choice, intra factory)
  10. week of production
  11. year
  12. the radial
  13. the tubeless
  14. nominal width
  15. ratio of cross section
  16. the radial
  17. diameter of a rim
  18. index of loading or characteristic
  19. speed index
  20. ECE quality mark * (an admission sign with a country code, for example, 3 – Italy)
  21. number of the admission

* DOT – Department of transport
* ECE – EEK – the Economic Commission for Europe

All symbols which you will find on lateral face of the tire, are explained here.

R: designation of a design of the tire as radial.
15: internal diameter of the tire in inches (").
90 or 91: designation of the bearing ability.
Q: admissible maximum speed to 160 km/h – a speed class for ordinary tires M + S.
S: the maximum speed is up to 180 km/h.
T: the maximum speed to 190 km/h – the maximum speed for tires M + S.
Н: to 210 km/h.
V: to 240 km/h.
W: to 270 km/h.
Z: over 270 km/h.