Valve - Canyon Mountain bike Manual

72 WHEELS TYRES AND INNER TUBES
Please note that the valves have different diameters.
Only use inner tubes with valves matching the rim.
Using a wrong valve may cause a sudden loss of air
pressure and hence throw you off your bike.
With this valve type it may happen that the valve
body is not screwed in properly and that air leaks out
slowly. Check the seat of the valve body in its stem.
Hand pumps are often unsuitable for inflating tyres
to high pressure. A better choice is a stand pump
equipped with a manometer which enables you to
check the pressure at home. There are adapters for
all types of valves which allow you to inflate any type
of inner tube at the filling station.
With Sclaverand valves you first have to
i
undo the small knurled nut a little and
press it in carefully until air starts to escape.
Always ride your bicycle with the pre-
scribed tyre pressure and check the pres-
sure at regular intervals, at least once a week.
Make sure the valve diameter matches the
!
hole in the rim and the valve is always in
upright position!
With race or Sclaverand valves the valve must be unscrewed
Valve adapter
Replace tyres with a worn tread or brittle
or frayed sides. Dampness and dirt pen-
etrating the tyre can cause damage to its inner
structure.
Replace spoilt rim tapes immediately.
Except: With Mavic system wheels you do
not need rim tapes.
In the extreme case damage to the tyre
may make the inner tube suddenly burst,
throwing you off your bike!
RIM TRUENESS,
SPOKE TENSION
The spokes connect the rim to the hub in the mid-
dle of the wheel. An even spoke tension makes for
the true running of the wheel. If the tension of indi-
vidual spokes changes, e.g. as a result of riding too
fast over a kerb or due to spoke breakage, the tensile
forces acting on the rim become unbalanced and the
wheel will no longer run true. The functioning of your
Canyon may even be impaired before you notice the
untrue wheel by its wobbling.
RIMS AND SPOKES WHEELS
Check the wheel trueness
Truing stand
Loose spokes must be tightened at once.
!
Otherwise the load on the other spokes
and the rim will increase.
Truing (retruing) wheels is a difficult job
!
which you should definitely leave to an ex-
pert.
Do not ride with untrue wheels. Risk of an
accident! It is therefore advisable to check
the wheels for trueness from time to time. For this
purpose lift the wheel from the ground and spin it
with your hand.
73