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BICYCLE
ASSEMBLY
BICYCLE
ASSEMBLY
TIRE VALVES
The tire valve allows air to enter the tire’ s inner tube
under pressure, but doesn’ t let it back out unless you
want it to.
There are primarily two kinds of bicycle tube valves
(actually, there are other designs, but they are seldom
seen in the US anymore): The Schrader Valve and the
Presta Valve. The bicycle pump you use must have the
itting appropriate to the valve stems on your bicycle.
The Schrader
(Shown) is like the valve on a car tire. To
inlate a Schrader valve tube, just remove the valve cap
and push the air hose or pump itting onto the end of the
valve stem. To let air out of a Schrader valve, depress the
pin in the end of the valve stem with the end of a key or
other appropriate object.
The Presta
(Shown) has a narrower diameter and is only
found on bicycle tires. To inlate a Presta valve tube using
a Presta headed bicycle pump, remove the valve cap;
unscrew (counterclockwise) the valve stem lock nut; and
push down on the valve stem to free it up. Then push the
pump head on to the valve head, and inlate. To inlate
a Presta valve with a gas station air hose, you’ll need a
Presta adapter (available at your bike shop) which screws
on to the valve stem once you’ve freed up the valve. The
adapter its the end of the air hose itting.
SHRADER VALVE
PRESTA VALVE
Flat wheel brace
Training
wheel
Brace
stabilizer
washer
Axle nut
Inner axle
Inner axle nut
DO NOT REMOVE
Training
wheel
Wheel
brace
Axle nut
Washer
Stabilizer bracket
FIG. C
FIG. D
TRAINING WHEELS
(CONTINUED)
FLAT BRACE
It is very important to check the training wheel connection
to the bicycle. Failure to properly tighten may cause the
training wheel to dislodge. Please contact Columbia Bicycles
Service with any questions.
Remove the outer axle nut and washer from the rear wheel axle.
Place the lat wheel brace onto the axle. Next place the brace
stabilizer washer onto the axle and align it so that the notch its
into the rear frame drop out. Replace the washer and axle nut.
Tighten the axle nut securely, making sure that the wheel brace
stays in the proper vertical position. The elongated hole on the
wheel brace allows the training wheel height to be adjusted for
proper it.
(Fig. C)
TRAINING WHEEL STABILIZER BRACKET
Remove the outer axle nut and washer from the rear wheel axle.
Insert the wheel brace into the stabilizer bracket so that the
forked end of the stabilizer bracket faces in. Slide assembly onto
the rear axle so that the forked end hooks around the chain stay
of the bicycle. Replace the axle nut and washer, secure tightly. The
elongated hole on the brace allows for raising and lowering the
training wheel to the proper height.
(Fig. D)
NOTICE:
Not all bicycles will accept training wheels. If your
bike did not come stock with training wheels, please call
Columbia Bicycles Service to help determine if after-market
training wheels can be attached.
