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WILIER.COM
d. SAFETY MECHANICAL CONTROLS AND FASTENERS.
Check the bike condition before every ride.
1) Check the bolts, nuts screws and fixing devices: always refer to the
“Tightening torques” table at the end of this manual or to the fixing specification
in the manufacturer’s instructions. The fasteners can be securely fixed only by a
qualified mechanic using a calibrated torque wrench. If you decide to service your
bike yourself, please use a torque wrench and refer to the tightening torque values
provided by the manufacturer of the bicycle or of the specific component.
Warning: Make sure the fasteners and couplings of your bike are not loose by
checking their tightening torques. If they are insufficiently fastened, the fastener
will not be properly sealed, if they are fastened excessively, the fasteners might
break, damaging the components and making the rider loose the control of the
bike and fall. If you do not know the meaning of “tightening torque” do not adjust
the screws by yourself but have them adjusted by a qualified mechanic.
2) Wheels and tires:
2.1) Make sure the tires are inflated at the recommended pressure and if necessary,
adjust the pressure (refer to the instructions provided by the manufacturer). Make
sure the tires are in perfect condition, make sure they have no cuts or holes on
the sides and on the tread. Should you notice signs of deterioration, have the tires
replaced before riding the bike.
2.2) Make sure the front and rear wheels are securely fixed.
2.3) Make sure the wheels are centred: spin each wheel and observe the rim as
it passes between the brake pads or the frame. Should you notice signs of rim
wobbling, have your bike fixed by the technical support department of your dealer.
To ensure a correct and efficient braking with single pivot side-pull caliper
brakes, wheels centring is essential.
2.4) Make sure the rims of the wheels are undamaged and clean. If your bike
is equipped with single pivot side-pull caliper brakes, check the entire braking
surface for signs of wear or deterioration.
WARNING: The bicycle rims with single pivot side-pull caliper brakes are
subjected to constant wear and tear. Some of the rims on the market come with
a wear indicator that becomes visible once the friction surface wears out. You
should replace the rim if you can see the indicator. Not replacing the rim might
result in breakage of the same, with subsequent loss of control and falling.
2.5) Pay attention to any wobbles or oscillations of the wheels. Rarely, some
cyclists e.g. heavier cyclists on bigger bicycles, might observe a “wobbling”,
“harmonic oscillation” or “frame vibration” at certain speeds. The experts have
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