Wheels And Tyres - Volvo 9700 Manual

Tyres
It is important that tyres are checked at
regular intervals to ensure optimum
conditions for safety and economy.
Tyres with poor tread depth are more
likely to glide, and have poorer grip on
slippery road surfaces.
If the tyre pressure is too low, they wear
out more quickly and fuel consumption
increases.
To avoid unnecessary wear
• Maintain the correct air pressure.
• Keep in mind that tyre wear
increases with speed.
• Do not drive with imbalanced wheels.
• Do not shift the tyres unnecessarily.
Wheel alignment
Wheel alignment is important for keeping
fuel consumption down and for reducing
wear on the tyres. When tyres are
unevenly loaded or overloaded, they
wear out faster.
Dual wheels
Use only tyres of the same type on dual
wheels. The tyres must have a max. of 6
mm difference in diameter.
Snow chains
Use snow chains when neccessay.
Snow chains reduce the allowable speed
to 50km/h, but increase traction and
braking on snowy or icy surfaces.
WARNING
Avoid kneeling and lowering the bus when
snow chains are used to avoid damage to
the wheel housing and bus side panels.
NOTE
The use of snow chains is subject to local
regulations. Some countries require chains
to be available and/or used under some
road conditions. Other countries prohibit
the use of chains since they can damage
road surfaces.
Tyre pressure
The tyre pressure should be checked at
regular intervals, at least once every 14
days. Adapt the pressure according to
the bus bodywork structure and axle
load, not according to the technical
maximum load.
Occasionally, check the pressure in the
spare wheel tyre.
Follow the recommendations of the
manufacturer. In cases where there are

Wheels and tyres

no such recommendations, you can
temporarily follow recommended values
in the below charts.
NOTE
The tyre pressures in the below charts are
taken from the European Tyre and Rim
Technical Organisation (ETRTO) standard
manual.
Dual mounting
115