Owner`s manual

Cervélo Owner’s Manual

which can cause serious injury or death. Therefore, it is

essential that you:

1. Ask your dealer to help you make sure you know

how to install and remove your wheels safely.

2. Understand and apply the correct technique for

clamping your wheel in place with a quick release.

3. Each time, before you ride the bike, check that the

wheel is securely clamped.

The wheel quick release uses a cam action to clamp the bike’s wheel

in place (see fig. 5). Because of its adjustable nature, it is critical that

you understand how it works, how to use it properly, and how much

force you need to apply to secure the wheel.

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

fig. 5