57
psi bar kPa
80 5.5 550
90 6.2 620
100 6.9 690
110 7.6 760
120 8.3 830
130 9.0 900
140 9.7 970
e
f
g
The air pressure recommended by the manufacturer
is given on the tire side or on the type label
(e)
. The
lower of the two pressure specifications makes for
better cushioning for lightweight riders and is there-
fore best for cycling on a rough surface. Rolling
resistance on level ground decreases with growing
pressure, but so does comfort. Highly inflated tires
are therefore most suitable for heavy riders and for
riding on tarred roads. Therefore, adjust the pressure
to your weight and your riding habits.
Inflation pressure is often given in the old system of
units, i.e. in psi (pounds per square inch). The table
(f)
gives the most common pressure values in terms
of both systems.
Clincher and folding tires and rim alone are not able
to hold the air. Therefore, an inner tube is placed
inside the tire to maintain the air pressure and the
tube is filled via a valve.
The rims of clincher and folding tires require, in gen-
eral, a high-value rim tape. This rim tape protects the
inner tube from the braking heat which could make
the tire burst.
G
Replace tires with a worn tread or with
brittle or frayed sides. Dampness and
dirt penetrating the tire can cause dam-
age to its inner structure. The tube might burst.
Risk of an accident!
G
If you mount a new tire with another size
than the standard tire mounted, there is
the risk of a toe overlap when riding at
reduced speed, i.e. that the food collides with the
front wheel. Risk of an accident!
G
Treat your tires with care. Always ride
your bike with the prescribed tire pres-
sure
(g)
and check the pressure at reg-
ular intervals, at least once a week. Riding with
too low or too high air pressure may make the tire
come off the rim or burst.
G
Clincher and folding tires allowing an
inflation pressure of five bars or more
have to be mounted on hook bead rims,
identifiable by the designation “C”.
G
Observe the maximum pressure value of
the rim. The pressure is dependent on
the tire width. You can find the values
in the operating instructions of the rim or wheel
manufacturer on this CENTURION CD-ROM.
h
Please note that a pedelec weighs more
and that your usual tire pressure may
be insufficient. A higher pressure gives
a better riding stability and reduces the risk of a
puncture. The minimum and maximum pressure
(in bar or psi) is indicated on the tire side.
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