Operation Manual

Chapter 3: Adjustment23
initial contact between the brake pads and
the rim. As you squeeze the brake lever, you
must move the lever to compress the spring
before you can apply full braking power to the
rim. This changes the way the brake feels, and
also makes the adjustment somewhat more
sensitive: if your brake with a modulator does
not pass inspection, transport your bicycle to
your dealer for adjustment.
• Disc brake: brake pads apply pressure to a
disc mounted to the hub of the wheel (Figure
30). The pressure is controlled with a hand
lever that is connected to the brake by a
cable or a hydraulic hose.
Inspection
Before every ride, perform the brake check listed
in Chapter 1. Each month examine all the brake
bolts, and examine the brake-pads for worn areas:
• Rim brakes: If the grooves in the brake-pad
surface are less than 2 mm deep (or 1 mm deep
for direct-pull brakes) replace the brake-pads.
• Disc brakes: Replace brake-pads that are
thinner than 1.0 mm.
To adjust the clearance between the
brake-pads and the rim
1. Turn the barrel-adjuster.
• For most direct-pull (Figure 27) or cantilever
(Figure 28) systems the barrel-adjuster is on
the lever. For most road caliper systems (Figure
29) the barrel-adjuster is on the brake itself.
• To increase the clearance between the
brake-pad and rim, turn the barrel-adjuster
clockwise. To decrease the clearance, turn
the barrel-adjuster counterclockwise.
2. If the brake-pads can not be adjusted correctly
with the barrel-adjuster, further work is required:
• Direct-pull and caliper: Decrease the
tightness of the cable-clamp bolt and attach
the cable again.
• Cantilever: Re-adjust the brake-pad alignment,
or transport the bicycle to your dealer.
FIGURE 27:
Direct-pull brake
1. Cable-clamp bolt
2. No touch
3. Pipe
4. Link
5. Pad-clamp bolt
6. Center-adjust screw
7. Arm-clamp bolt
2
1
5
6
7
3
4
FIGURE 28:
Cantilever brake
1. Linkwire
2. Arm-clamp bolt
3. Center-adjust screw
4. Pad-clamp bolt
1
4
2
3
FIGURE 29:
Caliper brake
1. Barrel-adjuster
2. Center-adjust screw
3. Brake release lever
4. Pad-clamp bolt
1
2
3
4
FIGURE 31:
Disc brake parts
1. Attachment bolts
2. Fixed-pad adjuster
3. Cable-clamp bolt
1
2
3