Bedienungsanleitung Merida Mountain Bike (Seite 64 von 129) (Englisch)

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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

The tires must be inﬂated to the proper inﬂation pressure

to provide an optimal compromise between smooth run-

ning and riding comfort. Properly inﬂated tires are also

more resistant to punctures. An insufﬁciently inﬂated tire

can easily get pinched (“snakebite”), when it goes over

a sharp kerb.

The air pressure recommended by the manufacturer is

given on the tire side or on the type label

(a)

. The low-

er of the two pressure speciﬁcations makes for better

cushioning for lightweight riders and is therefore 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

(b)

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 has to be placed

inside the tire to retain the air pressure.

The rims of clincher and folding tires require, in general,

a high-value rim tape. This rim tape protects the inner

tube from the braking heat which could make the tire

burst.

Replace tires with a worn tread or with brit-

tle or frayed sides. Dampness and dirt pene-

trating the tire can cause damage to its inner

structure. The tube might burst. Risk of an accident!

If you mount a new tire with another size than

the standard tire mounted, it might be possi-

ble that the clearance between the front of

your shoe and the wheel will be reduced when you ride

at reduced speed. Risk of an accident!

Treat your tires with care. Always ride your

bike with the prescribed tire pressure and

check the pressure at regular intervals, at

least once a week

(c)

. Riding with too low or too high

air pressure may make the tire come off the rim or burst.

Clincher and folding tires allowing an inﬂa-

tion pressure of ﬁve bars or more have to be

mounted on hook bead rims, identiﬁable by

the designation “C”.

Observe the maximum pressure value of the

rim. The pressure is dependent on the tire

width. You can ﬁnd the values in the oper-

ating instructions of the rim or wheel manufacturer on

this MERIDA CD-ROM.

Please note that a pedelec weighs more and

that your usual tire pressure may be insufﬁ-

cient. A higher pressure gives a better riding

stability and reduces the risk of a puncture. The mini-

mum and maximum pressure (in bar or PSI) is indicated

on the tire side.

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Merida Mountain Bike Seite 64

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