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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.
H. Bicycle Suspension
Some Mountain Bikes come equipped with suspension systems which are designed to smooth out some of the shocks encoun-
tered in off-road riding. There are many different types of suspension systems — too many to deal with individually in this
Manual. If your bicycle has a suspension system of any kind, consult a qualified specialist to provide you with the appropriate
adjustment and maintenance instructions.
WARNING: Failure to maintain, check and properly adjust the suspension system may result in suspension malfunction, which
may cause you to lose control and fall.
CAUTION: Changing suspension adjustment can change the handling and braking characteristics of your bicycle. Never
change suspension adjustment unless you are thoroughly familiar with the suspension system manufacturer’s instructions and
recommendations, and always check for changes in the handling and braking characteristics of the bicycle after a suspension
adjustment by taking a careful test ride in a hazard-free area.
CAUTION: Not all bicycles can be safely retrofitted with some types of suspension systems. Before retrofitting a bicycle with
any suspension, check with the bicycle’s manufacturer to make sure that what you want to do is compatible with the bicycle’s
design.
WARNING: If your bike has suspension, the increased speed you may develop also increases your risk. When braking, the
front of a suspended bike dips. You could lose control and fall if your skill is not up to handling this system. Get to know how to
handle your suspension system safely before trying any downhill or very fast mountain biking.
Suspension can increase the handling capabilities and comfort of your bicycle. This enhanced capability may
allow you to ride faster; but you must not confuse the enhanced capabilities of the bicycle with your own
capabilities as a rider. Increasing your skill will take time and practice. Proceed carefully until you are sure
you are competent to handle the full capabilities of your bike. Never ride at a speed or on terrain which is
not suitable for your personal riding skill and experience. Always proceed cautiously in areas where you are
not familiar with the terrain. If you exceed your limitations, serious injury or death could occur.
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