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Cervelo Multi-speed racing bicycles Manual

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Cervélo Owner’s Manual
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
There are primarily two kinds of bicycle tube valves: 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 valve (fig. 12) is like the valve on a car tire. To inflate a
Schraeder valve tube, remove the valve cap and clamp the 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 (fig. 12) 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 Schraeder pump fitting, 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 into the
Schraeder pump 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.
WARNING: Patching a tube is an emergency repair. If you do
not apply the patch correctly or apply several patches, the
tube can fail, resulting in possible tube failure, which could
cause you to loose control and fall. Replace a patched tube
as soon as possible.
3. Clincher and Tubular Tires
There are primarily two kinds of bicycle tires: The Clincher Tire and
the Tubular Tire. Clincher tires are shaped like a “U” in cross section,
with wire or Kevlar beads on the outer edge of both sides that hook
onto the rim and hold the tire in place on the wheel over the inner
tube. Tubular tires do not have beads – the outer edges of the tire
are sewn together around the inner tube, which is then glued to the
rim to hold it in place.
Your Cervélo bicycle will be equipped with clincher tires from the factory,
however many riders may wish to purchase a second set of wheels utilizing
tubular tires. If you install wheels with tubular tires on your bicycle, it is
very important that you obtain and read all safety information about
tubulars from the wheel & tire manufacturers, in particular the information
on the proper technique for gluing the tires to the rim. Improperly glued
tubular tires can separate from the rim causing a serious crash. It is up to
the rider to take responsibility for ensuring their tubular wheels and tires
are safe to use.
WARNING: Improperly installed tubular tires can separate
from the rims during a ride, possibly causing a serious crash
that may result in injury or death.
Schraeder valvePresta valve
turn
locknut
fig. 12
… 27 …


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