Giant Bicycles Owner's Manual page 20

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 the wheel safely in the dropouts.
a. Adjusting the quick release mechanism
The wheel hub is clamped in place by the force of the quick release 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.
b. 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
quick release is incorrectly adjusted. Secondary retention devices are not a
substitute for correct quick release adjustment.
Secondary retention devices fall into two basic categories:
(1) The clip-on type is a part which the manufacturer adds to the front
wheel hub or front fork.
(2) 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
quick release is not adjusted 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 correct quick
release adjustment. Failure to properly adjust the quick release mechanism
16