When selecting a tyre, look for the one most suitable for the job.
Tyre size and P.R should be determined after weighing the loads on
each wheel according to accepted procedures or after calculating the
loads. Generally, it is recommended to choose the tyre that carries
the load with the lowest inflation pressure. After selecting the
tyres and mounting them do not overload the vehicle, for example, by
LOAD AND INFLATION PRESSURE
In order to obtain the best results from your tyres, maintain the correct inflation pressure at all times. Bear in mind that it takes
the tyre up to 24 hours to cool after completing a job. For this
reason it is recommended that you check and adjust the inflation
pressure after long breaks or weekends. In addition, tyre pressure
should be checked every month and occasionally during the work day,
taking into account that the heat build-up raises the pressure by up
to 15 psi. If, however, the inflation pressure exceeds the
additional 15 psi, reduce the load or the driving speed.
• Never lower inflation pressure by bleeding, since it increases the
• Cover all valves with caps to prevent the penetration of dirt.
• Load and inflation pressures should be determined according to
length of the haul. Maintenance of the haul road can substantially
increase the tyres life.
• It is permitted to use regular skid depth tyres without dry ballast
in transit, on the condition that the following rules are carefully
- The vehicle must be unloaded during transit.
- Maximum highway speed must be limited to 50km/h, for wide
based tyres to 32km/h.
- Proper inflation pressure must be checked and maintained
according to manufactures instructions.
- 30 minute intervals should be observed for cooling off,
every 80 driving kilometres or after 2 hours of sustained
operation, whichever comes first.
- A minimum one-hour midday stop should be observed during
full day operation.
To get the maximum from your off-the-road tyre, it is essential to
adopt proper driving habits. Avoid chuck holes, tyre damaging
hazards and refrain from the strong spinning, sudden starting or
breaking maneuvers, high speed cornering, locking one wheel for
sharp turns etc. All of these may harm your tyres and shorten their
MOUNTING AND DISMOUNTING
•Always practice correct mounting and dismounting procedures, and
make sure you have taken all safety precautions. Remember, many
severe accidents are the result of carelessness in mounting or
• Before mounting the tyres on the vehicle, check the wheels and rims
and make sure the vehicle is in perfect mechanical condition. Upon
completion of the mounting process, check the clearance between the
wheel and the vehicle all around. For duals, install a permanent
rock ejector to prevent damage from wedged rocks.
• Duals should not vary in their overall diametre more than 1/4 for
tyres of up to 8.25" cross section, and 1/2 for tyres with cross
section of 9.00" and above. If this is not adhered to, the larger
the tyre is likely to fail prematurely. Never try to make up for
larger differences by changing the inflation pressure.
Do not store tyres for more than a few months. Stores should be dark
and cool, free of dirt and oils and as far as possible form running