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Cable Adjustment Barrel
Lock Nut
Centering
Adjustment Bolt
Adjustment - Sidepull Calipers
Minor brake adjustment can be made via the cable adjusting
barrel, usually located at the upper cable arm. To adjust, squeeze
the brake pads against the rim, loosen the lock nut and turn the
adjuster Brake pad clearance should be a maximum 2mm from
the rim. When correct, re-tighten the lock nut. If the pads cannot
be set close enough to the rim in this manner, you may have to
adjust the cable length. Screw the barrel adjuster 3/4 of the way in,
squeeze the pads against the rim, undo the cable anchor bolt and
pull the cable through with pliers. Re-tighten the cable anchor bolt
and apply full force to the brake lever to test, then fine tune using
the barrel adjuster. If one pad is closer to the rim than the other,
loosen the fixing nut at the back of the brake, apply the brake to
hold it centered, and re-tighten the fixing nut.
Ensure the Brake fixing nut is secured tightly.
Failure to do this may cause the Brake assembly
to dislodge from the fork.
Most modern side-pull calipers also have a centering adjustment
bolt, which enables you to properly center the caliper over the rim.
This centering adjustment should be set so that there is an equal
distance between the brake pad and the rim on both sides of the
wheel. You should also check to be sure that the brake pads
themselves are properly adjusted. The pad should contact the rim
so that it is centered from top to bottom on the rim brake wall
surface. In general, it is important that there is no less then 1mm of
distance between the top of the brake pad and the top of the rim in
order to ensure that the brake pad does not contact the tire in any way.
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