Infinity BMX BICYCLES, Owner'S Manual

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Detailed Maintenance Detailed Maintenance
Adjustment - Cantilever Calipers
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Brake Pads
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Some brakes have a special mechanism that enables you to set the
clearance on either side of the rim using a screwdriver. Brake pads
should finally be adjusted so that the leading edge of the pad makes
first contact with the rim. Some brakes have special curved washers to
allow this, but on less complex models it will be necessary to apply a
little force to the pad and its mounting.
Adjustment – Cantilever Calipers
Minor brake adjustment can be made via the barrel cable adjusters that
are located on each brake lever. To adjust, squeeze the brake pads
against the rim, loosen the lock nut, and turn the adjuster to pull the
brake pads closer to, or spread them away from the rim as required.
Brake pad clearance should be a maximum 2mm form 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 either the length of the straddle cable of the length
of the straddle cable or the length of the brake cable.
If the brakes use a separate brake cable and straddle cable, adjust the
straddle length by first screwing the barrel adjuster 3/4 of the way in,
then loosening the straddle cable fixing bolt, then pulling or pushing the
cable through the fixing bolt.
Check that the straddle bridge is in the middle of the cable to ensure
even brake pad contact. Apply full force to the brake lever to test, then
fine tune using the barrel adjuster.
To adjust the brake cable length, loosen the brake cable fixing bolt on
the cable straddle bridge, adjust the length until the brake shoes are the
correct distance from the rim, then re-tighten and test.
Parallel
Parallel
Fully Adjustable Brake Shoes
Curved
Adjustment
Washer
Curved
Adjustment
Washer
2mm clearance
On some newer type cantilever brakes, the main brake cable continues
through the central cable carrier to an anchor bolt on one of the brake arms.
A shorter link cable reaches form the carrier and the hook on the other brake
arm. Adjustment of the cable length is made after loosening the anchor bolt
on the brake arm. Adjust the brake pad position so that it is parallel to the
wheel rim and so that the leading edge makes first contact.
To do this, fit an Allen key into the brake pad holding bolt, loosen the fixing
nut and adjust. Move the brake pad along its mounting post to alter the
distance from the rim, and move the curved adjustment washer to alter the
angle of the pad.
On some models there is a spring-force adjustment screw on the brake arm
that allows further fine turning of the brake shoe position.
Bicycles with cantilever brakes must be fitted with safety devices to prevent
a possible accident in the event of the brake control cable or the straddle
bridge becoming loose or breaking while riding.
These are usually the reflector brackets, and must be fitted in the front and
rear. The bracket will prevent the straddle cable from interfering with the
wheel should the cable become disconnected from the control cable. If the
reflector brackets are not fitted in this position, then alternative emergency
cable safety stops must still be fitted.
Usable Brake Shoe Worn Out Brake Shoe (Replace)
Tread Tread Worn Off
Align brake shoe with rim surface
Direction of rim
rotation
0.5 - 1.0 mm
Brake Shoe Holding Nut