Seat Post Cam Action Clamp - MARIN Bicycle Owner's Manual

force, you should have to wrap your fingers around the fork blade for
leverage, and the lever should leave a clear imprint in the palm of your
hand.
(b) With a through-bolt or bolt-on system, tighten the fasteners to the
torque specifications in Appendix D or the hub manufacturer's instructions.
NOTE: If, on a traditional cam action system, the lever cannot be pushed
all the way to a position parallel to the fork blade, return the lever to the
OPEN position. Then turn the tension adjusting nut counterclockwise one-
quarter turn and try tightening the lever again.
(5) With a through-bolt or bolt-on system, tighten the fasteners to the
torque specifications in Appendix D or the hub manufacturer's instructions.
WARNING: Securely clamping the wheel with a cam action
retention device takes considerable force. If you can fully close
the cam lever without wrapping your fingers around the fork
blade for leverage, the lever does not leave a clear imprint in
the palm of your hand, and the serrations on the wheel fastener
do not emboss the surfaces of the dropouts, the tension is
insufficient. Open the lever; turn the tension adjusting nut
clockwise a quarter turn; then try again. See also the first
WARNING in this Section, p. 18.
(6) If you disengaged the brake quick-release mechanism in 3. a. (1)
above, re-engage it to restore correct brake pad-to-rim clearance.
(7) 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.
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c. Removing a disk brake or rim brake Rear Wheel
(1) If you have a multi-speed bike with a derailleur gear system: shift the
rear derailleur to high gear (the smallest, outermost rear sprocket).
If you have an internal gear rear hub, consult your dealer or the hub
manufacturer's instructions before attempting to remove the rear wheel.
If you have a single-speed bike with rim or disk brake, go to step (4) below.
(2) If your bike has rim brakes, disengage the brake's quick-release
mechanism to increase the clearance between the wheel rim and the brake
pads (see Section 4.C, figs. 11 through 15).
(3) On a derailleur gear system, pull the derailleur body back with your right
hand.
(4) With a cam action mechanism, move the quick-release lever to the
OPEN position (fig. 8b). With a through bolt or bolt on mechanism, loosen
the fastener(s) with an appropriate wrench, lock lever or integral lever; then
push the wheel forward far enough to be able to remove the chain from the
rear sprocket.
(5) Lift the rear wheel off the ground a few inches and remove it from the
rear dropouts.
d. Installing a disk brake or rim brake Rear Wheel
CAUTION: If your bike is equipped with a rear disk brake, be
careful not to damage the disk, caliper or brake pads when re-
inserting the disk into the caliper. Never activate a disk brake's
control lever unless the disk is correctly inserted in the caliper.
(1) With a cam action system, move the cam lever to the OPEN position
(see fig. 8 a & b). The lever should be on the side of the wheel opposite the
derailleur and freewheel sprockets.
(2) On a derailleur bike, make sure that the rear derailleur is still in its
outermost, high gear, position; then pull the derailleur body back with your
right hand. Put the chain on top of the smallest freewheel sprocket.
(3) On single-speed, remove the chain from the front sprocket, so that you
have plenty of slack in the chain. Put the chain on the rear wheel sprocket.
(4) Then, insert the wheel into the frame dropouts and pull it all the way in
to the dropouts.
(5) On a single speed or an internal gear hub, replace the chain on the
chainring; pull the wheel back in the dropouts so that it is straight in the
frame and the chain has about 1/4 inches of up-and-down play.
(6) With a cam action system, move the cam lever upwards and swing it
into the CLOSED position (fig. 8 a & b). The lever should now be parallel
to the seat stay or chain stay and curved toward the wheel. To apply
enough clamping force, you should have to wrap your fingers around the
fork blade for leverage, and the lever should leave a clear imprint in the
palm of your hand.
(7) With a through-bolt or bolt-on system, tighten the fasteners to the
torque specifications in Appendix D or the hub manufacturer's instructions.
NOTE: If, on a traditional cam action system, the lever cannot be pushed
all the way to a position parallel to the seat stay or chain stay, return
the lever to the OPEN position. Then turn the tension adjusting nut
counterclockwise one-quarter turn and try tightening the lever again.
WARNING: Securely clamping the wheel with a cam action
retention device takes considerable force. If you can fully close
the cam lever without wrapping your fingers around the seat
stay or chain stay for leverage, the lever does not leave a clear
imprint in the palm of your hand, and the serrations on the
wheel fastener do not emboss the surfaces of the dropouts, the
tension is insufficient. Open the lever; turn the tension
adjusting nut clockwise a quarter turn; then try again. See also
the first WARNING in this Section, p. 18.
(8) If you disengaged the brake quick-release mechanism in 3. c. (2)
above, re-engage it to restore correct brake pad-to-rim clearance.
(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.
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