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(9) Spin the wheel to make sure that it is centered in the frame and clears the brake pads; then squeeze the brake
lever and make sure that the brakes are operating correctly.
B. Seat post cam action clamp
Some bikes are equipped with a cam action seat post binder. The seat post cam action binder works exactly like the
traditional wheel cam action fastener (Section 4.A.2) While a cam action binder looks like a long bolt with a lever
on one end and a nut on the other, the binder uses an over-center cam action to firmly clamp the seat post (see fig.
8a).
WARNING: Riding with an improperly tightened seat post can allow the saddle to turn or move and
cause you to lose control and fall. Therefore:
1. Ask your dealer to help you make sure you know how to correctly clamp your seat post.
2. Understand and apply the correct technique for clamping your seat post.
3. Before you ride the bike, first check that the seat post is securely clamped.
Adjusting the seat post cam action mechanism
The action of the cam squeezes the seat collar around the seat post to hold the seat post securely in place. 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 and unsafe clamping force.
WARNING: The full force of the cam action is needed to clamp the seat post 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 seat post safely.
WARNING: If you can fully close the cam lever without wrapping your fingers around the seat post or a
frame tube for leverage, and the lever does not leave a clear imprint in the palm of your hand, the
tension is insufficient. Open the lever; turn the tension adjusting nut clockwise a quarter turn; then try
again.
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