Rim Trueness, Spoke Tension - Canyon ROAD BIKE Manual

90 WHEELS RIMS AND SPOKES
RIM TRUENESS,
SPOKE TENSION
The spokes connect the rim to the hub in the middle
of the wheel. An even spoke tension makes for the
true running of the wheel. If the tension of individu-
al 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. With rim brakes the
sides of the rims also serve as braking surfaces. An
untrue wheel can impair your braking power.
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!
Check of wheel trueness with brake pads
Truing stand
Do not ride with untrue wheels. In the case
of extreme side-to-side wobbles the brake
pads of road bike brakes can miss the rim and
get caught in the spokes! This normally results
in an immediate blocking of the wheels, possibly
throwing you off your bike! It is therefore advis-
able 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. Watch the gap
between rim and brake pads. If the gap varies by
more than a millimetre, you should ask a skilled
mechanic to true up the wheel.
WHEEL FASTENING WITH QUICK-RELEASES
The wheels are attached to the frame at the hub ax-
les. Each axle is clamped tight in the drop-outs by
means of a quick-release.
Quick-releases require no tools at all. Just release
the lever, unscrew it a few turns, if necessary, and
remove the wheel (see chapter "How to use the
quick-release").
However, a thief will find this just as easy to do! As
an anti-theft measure you can replace the quick-re-
leases by special locks. They can only be opened and
closed with a special, coded key or an Allen key.
Never ride a bicycle without having first
checked whether the wheels are securely
fastened! A wheel that comes loose whilst riding
will throw you off your bicycle!
QUICK-RELEASE WHEELS
Open the quick-release lever
Close the quick-release lever
The quick-release lever ought to be nearly parallel to the wheel and
must not stick out
If your bicycle is equipped with quick-
!
releases, be sure to lock the frame to an
immovable object together with the wheels when
you leave it outside.
91