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CAUTION: Pencil type automotive tire gauges and gas station air hose pressure settings can be inaccurate and
should not be relied upon for consistent, accurate pressure readings. Instead, use a high quality dial gauge.
Check inflation as described in you'll know how correctly inflated tires should look and feel. Some tires may need to be
brought up to pressure every week or two.
Some special high-performance tires have unidirectional treads: their tread pattern is designed to work better in one direction
than in the other. The sidewall marking of a unidirectional tire will have an arrow showing the correct rotation direction. If your
bike has unidirectional tires, be sure that they are mounted to rotate in the correct direction.
2. 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 any more):
The Schraeder Valve and the Presta Valve. The bicycle pump you use must have the fitting appropriate to the valve stems on
your bicycle.
The Schraeder is like the valve on a car tire. To inflate a Schraeder valve tube, 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 valve 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. Close the valve after inflation. To let air out of a Presta valve, open up
the valve stem lock nut and depress the valve stem.
3. Rim Tape
The majority of all bicycle rims require the use of an adhesive rim tape or rubber rim strip. The purpose of the rim tape is to
protect the tube from being punctured by the spoke nipples on single walled rims or the spoke holes on double walled rims. It
is important to have the correct sized rim tape in order to fully cover the rim bed. If you need to replace the rim tape at any
time, your dealer will be able to assist you in selecting the correct replacement.
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©2014 PACIFICCYCLE INC.
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