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The Schraeder
(Shown) is like the valve on a car tire. To inflate a Schroeder
valve tube, just remove the valve cap and push the air hose or pump fitting onto
the end of the valve stem. To let air out of a Schraeder 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 inflate 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 inflate. To inflate 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 fits the end of the air hose fitting.
To let air out of a Presta valve, open up the valve stem lock nut and depress the
valve stem. Always close the valve stem lock after inflation.
Schraeder Valve
Presta Valve
TIRE REMOVAL
1.
Let the air out of the tire by depressing the valve core (the little
pin in the centre of the valve stem opening).
2.
Separate the tire bead from the sides of the rim by pressing with
your thumbs. Work your way around the tire on both sides to be
sure that the beads of the tire are not sticking to the rim. (Figure
A)
3.
Stand the wheel up on a firm surface with the valve stem on the
bottom and grasp the upper part of the tire with both hands. Try to
roll the tire off the far side of the rim.
4.
With the wheel standing as in Figure 3, use bicycle tire tools or
spoon handles with rounded ends (at least two
– preferably three)
to lift the bead on one side of the tire off the rim. Be careful not to
pinch the inner tube between the tire tools and the tire bead or
rim. Once you have got the bead off for about one fourth of the
circumference of the tire using the tools, the rest can usually be
pulled off by hand.
5.
With the bead on one side of the tire completely off the rim, you
can now pull the inner tube out from between the tire and rim
everywhere except in the area of the valve stem.
6.
It should now be easy to pull the tire the rest of the way off the
rim. Start at the side of the wheel opposite the valve stem and
simply lift the bead of the tire up over the side of the rim and pull it
off.
REPAIR AND SERVICE
WARNING:
Inspect the bicycle frequently. Failure to inspect the bicycle and to make repairs or
adjustments, as necessary can result in injury to the rider or to others. Make sure all parts are correctly
assembled and adjusted as written in this manual and any "Special Instructions".
Immediately replace any damaged, missing, or badly worn parts.
Make sure all fasteners are correctly tightened as written in this manual and any "Special Instructions".
Parts that are not tight enough can be lost or operate poorly. Overtightened parts can be damaged.
Make sure any replacement fasteners are the correct size and type.
If your frame is aluminum, inspect the bicycle frame carefully and frequently. Aluminum frames can
develop very small cracks due to stress, severe shocks, etc. If you see any small cracks, stop riding
