Cannondale Synapse Carbon Owner's Manual page 24

PaRt i
1. front Wheel secondary Retention devices
Most bicycles have front forks which utilize a
secondary wheel retention device to reduce the risk
of the wheel disengaging from the fork if the wheel
is incorrectly secured. Secondary retention devices
are not a substitute for correctly securing your front
wheel.
secondary retention devices fall into two basic
categories:
a. The clip-on type is a part which the manufacturer
adds to the front wheel hub or front fork.
b. The integral type is molded, cast or machined
into the outer faces of the front fork dropouts.
Ask your dealer to explain the particular secondary
retention device on your bike.
WaRninG
do not Remove oR disaBle the seCondaRy
Retention deviCe.
As its name implies, it serves as a back-up for a
critical adjustment. If the wheel is not secured
correctly, the secondary retention device can
reduce the risk of the wheel disengaging from
the fork. Removing or disabling the secondary
retention device may also void the warranty.
Secondary retention devices are not a substitute
for correctly securing your wheel. Failure to
properly secure the wheel can cause the wheel
to wobble or disengage, which could cause you
to loose control and fall, resulting in serious
injury or death.
2. Wheels With Cam action systems
There are currently two types of over-center cam
wheel retention mechanisms: the traditional over-
center cam (fig. 8a) and the cam-and-cup system (fig.
8b). Both use an over-center cam action to clamp
the bike's wheel in place. Your bicycle may have a
cam-and-cup front wheel retention system and a
traditional rear wheel cam action system.
a. adjusting the
mechanism (fig. 8a)
The wheel hub is clamped in place by the force
of the over-center cam pushing against one
dropout and pulling the tension adjusting nut,
by way of the skewer, against the other dropout.
The amount of clamping force is controlled by
the tension adjusting nut. Turning the tension
adjusting nut clockwise while keeping the cam
lever from rotating increases clamping force;
turning it counterclockwise while keeping the
cam lever from rotating reduces clamping force.
Less than half a turn of the tension adjusting nut
can make the difference between safe clamping
force and unsafe clamping force.
WaRninG
the fUll foRCe of the Cam aCtion is
needed to ClamP the Wheel seCURely.
Holding the nut with one hand and turning
the lever like a wing nut with the other hand
until everything is as tight as you can get it
will not clamp a cam action wheel safely in the
dropouts.
see also WaRninG on page 20.
22
traditional Cam action