Tyre maintenance

INFLATION PRESSURE

-       It is of extreme importance that the specified inflation pressure is maintained. Driving with inadequately inflated tyres can be very hazardous. If tyres are underinflated, the temperature rises, which can result in an abrupt tyre destruction. Tyre pressure can further define the service life of a tyre. A correct inflation pressure ensures the maximum distance travelled along with a satisfactory stability, driving comfort and road grip. Tyre pressure maintains the shape of tyre.

-       Insufficient pressure or incorrect mounting accelerates tyre wear and tear and additionally loads the tyre carcass.

-       Excessively high pressure can cause tyre wear in the centre of the tyre tread, and increases potential of tyre tread cracks.

-       Inflate tyres to the value specified in the manual for use of motorcycles.

-       Maintain the specified pressure as a minimum inflation pressure. If driving fast, increase the pressure by 0.2 Bar; if driving with a lot of luggage, increase the inflation pressure in the rear tyre by 0.2 Bar.

-       Using a calibrated pressure gauge, check the inflation pressure at least once per week when the tyre is cold and always before making a longer trip.

-       Consider the fact that the pressure increases when the tyre is hot, and decreases when the tyre is cold. The pressure can also drop if a valve insert does not fit well or is worn-out.

-       Check the valve insert, screw it or replace it if required.

-       Always place the valve cap (screw tightly), which functions as a seal preventing dust from intrusion.

-       In the case of tubeless tyres, maintain the valve or replace it when mounting a new tyre.

-       When replacing a tube-type tyre (mounting with a tube), a new tube should be used. Tubes stretch during use. A repeated use of an already stretched and, consequently, thinner tube can increase the chance for a tube puncture and an abrupt pressure loss, which can aggravate the stability of a vehicle and cause a fall.

 

MOTORCYCLE TYRE

-       Assure a sufficient distance between the individual motorcycle parts (mudguards, forks, transmission chain) and the tyre mounted on the rim.

-       During rides at higher speeds the outer dimensions of a tyre enlarge as a result of a centrifugal force. The increase can be even larger with a diagonal tyre; therefore, do not change the nominal tyre dimensions.

-       Due to a danger of a contact between the tyre and the motorcycle parts, and developing uneven wear and tear, make sure that the wheel base is correctly adjusted after transmission chain becomes worn-out.

 

TYRE AND RIM

-       Suitable flaps have to be used with spoke wheels. Regularly maintain flaps since the protruding spoke head can damage and puncture the tube.

-       Correctly balance the tyre on the rim and regularly examine it. In Slovenia, the legally specified tread depth amounts to 1 mm (in Germany to 1.6 mm) over at least ¾ tyre tread width, however , we recommend to replace the tyre earlier, since worn-out tyres are more likely to get damaged, and have poorer road grip, particularly on wet surfaces. Damaged tyres can be very dangerous and should be immediately replaced.

-       Immediately eliminate rocks and nails pushed into the tyre tread, since they can puncture the carcass, cause a failure and, consequently, an accident. The main benefit of a tubeless tyre is that despite being punctured with a nail, an abrupt pressure drop is not possible. Yet, if a driver is not aware of a tyre failure and continues the ride, the damage can spread and become hazardous.

-       If the pressure drops, the tyre has to be removed from the rim and inspected, the reason for a pressure drop is to be established prior to any repair.

-       We strongly advise against any repairs of the tyre shoulder and sidewall area.

-       Furthermore, we strongly advise against any repairs of the P speed category tyres or higher.

-       It is not allowed to repeatedly use a damaged TL tyre with a tube.

-       The tyre can behave differently in contact with oil or fat, therefore clean it with a cloth soaked in benzene.

-       MITAS tyres are manufactured with a minor mass imbalance. To achieve a perfect mass balance of the tyre and rim construction an additional balancing procedure is required for driving at higher speeds.

-       Motorcycles may be used only with the rims specified by the vehicle manufacturer. The use of suitable rims is of importance for a stable ride and other driving characteristics. If the tyre is mounted on a too narrow or a too wide rim, this can lead to a change in the tyre tread shape, which negatively impacts the driving characteristics in general.

 

TYRE TREAD WEAR AND TEAR

Different factors can cause an abnormal tyre wear and tear:

-       Insufficient pressure or overload can deform the surface and result in incorrect wear. It can come to a sudden defect in the carcass as a result of excessive bending and a sudden air release.

-       High speed, heavy accelerating and braking.

-       The temperature of driving surface (higher temperature results in higher wear).

-       A rough driving surface (the rougher the surface, the higher the wear and, consequently, the shorter the service life).

-       Mechanical irregularities such as deformed wheels, incorrect brake adjustment, poor-quality shock absorbers, a too large gap between the wheel bearings, etc.

-       Unbalanced rotation mass of the tyre and rim construction.

Incorrect adjustment of the rear wheel when replacing or adjusting the transmission chain. Each rotation of an incorrectly adjusted rear wheel causes additional and uneven wear of the tyre tread surface and has a negative impact on driving characteristics of a vehicle, which can lead to a loss of stability during the ride.

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