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Tires
Tires

Tires

A tire’s function is to reliably transmit the propelling and steering forces to the road and to absorb all impacts acting upon your vehicle driving on an uneven surface. Tires have a very significant impact on the safety, reliability and ride comfort of your vehicle.

Tire air pressure

  • Check tire air pressure regularly, at least once every 2 to 4 weeks. The pressure must be checked when the tires are cold. Even if the tires are heated only slightly, the pressure measurement will be inaccurate..
  • If you lose or damage the valve elements, replace immediately. Tighten all valves properly and check whether the function surfaces are not damaged.
  • Check air pressure in the spare tire regularly. A rule applies that the spare tire pressure must be about 0.5 atmosphere higher than the prescribed pressure. Adjust the pressure after the spare wheel has been fitted to an axle.

Tire damage

Example Possible cause
Grater wear in the tread center The tire pressure is too high
Greater wear in the treat shoulders Greater wear in the treat shoulders
Considerably worn patches around the tire’s circumference Defective suspension, Defective shock absorbers, intensive braking
The tread worn on one side Incorrect wheel alignment
  • Check regularly whether the tire has the prescribed pressure and whether it is not damaged
  • don’t forget that every tire has also its inner part which may be checked by a specialist with necessary technical tools only,
  • have the tires checked by a specialist at least 4-times a year, to see whether they are OK.

Don’t forget that even new tires will be worn out quickly unless any defects in the steering and chassis are not rectified by a specialist !


Tread height

Tires must be replaced at the latest when the worn our tread has reached the minimum height of 1.6 mm.

  • To ensure correct functioning, we recommend to replace summer tires already when the tread height is 2 mm, and winter tires when the tread height is 4 mm.
  • In wide tires the tread height must not be less than 3 mm.

Tire life

  • When a car or a trailer is to be unused for a protracted period of time, relieve weight on the tires and cover the tires
  • Replace tires of mobile homes and less frequently used tires after 5 to 7 years!
  • Use spare tires older than six years only in emergency situations!

What does the alphanumeric marking 195/65 R 15 V on the tire mean?

195 the tire width Irrespective of the tire construction, this information is always given in mm
65 the tire height-to-width ratio in % This is calculated by dividing the tire height by the tire width in mm, and multiplied by 100
R the tire construction identifier [R identifies a radial tire, D or a hyphen (-)identifies a diagonal tire
15 the rim diameter This is usually stated in inches, but may be also in mm.
V speed symbol The tire highest permissible speed is specified by an alphabetic code.

Highest speed in km/h
(Passenger car tires)

M 130
P 150
Q 160
R 170
S 180
T 190
H 210
V 240
W 270
Y 300
ZR nad 240

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