Zigo Leader 1080 Serie Manuel Du Propriétaire page 28

diff erent gears. At fi rst, practice shifting where there are no obstacles, hazards or
other traffi c, until you've built up your confi dence. Learn to anticipate the need to
shift, and shift to a lower gear before the hill gets too steep. If you have diffi culties
with shifting, the problem could be mechanical adjustment. See a bicycle dealer
for help.
4.4.3 What if it won't shift gears?
If moving the shift control one click repeatedly fails to result in a smooth shift
to the next gear, chances are that the mechanism is out of adjustment. Take the
bike to your local bicycle dealer to have it adjusted.
4.5 Tires and Tubes
4.5.1 Tires
Your Zigo® Leader™ is equipped with tires that were selected because they are
well suited to the intended use of the Leader™. If you need to replace worn or
damaged tires, you should do so with tires of identical size, similar pressure rating
and similar tread pattern.
The size and pressure rating are marked on the sidewall of the tire. The part of
this information which is most important to you is Tire Pressure.
WARNING: Never infl ate a tire beyond the maximum pressure marked
on the tire's sidewall. Exceeding the recommended maximum pressure may
blow the tire off the rim, which could cause damage to the bike and injury
to the rider and bystanders.
The best and safest way to infl ate a bicycle tire to the correct pressure is with a
bicycle pump which has a built-in pressure gauge.
WARNING: There is a safety risk in using gas station air hoses or other
air compressors. They are not made for bicycle tires. They move a large
volume of air very rapidly, and will raise the pressure in your tire very
rapidly, which could cause the tube to explode.
Tire pressure is given either as maximum pressure or as a pressure range. How
a tire performs under diff erent terrain or weather conditions depends largely on
tire pressure. Infl ating the tire to near its maximum recommended pressure gives
the lowest rolling resistance; but also produces the harshest ride. High pressures
work best on smooth, dry pavement.
Very low pressures, at the bottom of the recommended pressure range, give
better cushioning on rougher surfaces, but result in increased rolling resistance.
Tire pressure that is too low for your weight and the riding conditions can cause a
26