I General User Manual 65
30.3.1 General tightening torques
for screw connections
The screw grade, e.g. 8.8, is embossed in the screw head.
Unless otherwise specied by the manufacturer, the fol-
lowing tightening torques (average values) apply depend-
ing on the screw grade:
GRADE
THREAD
VA /
VA . . .
M4 3 2.7 3.8 4.6
M5 5 5.5 8 9.5
M6 8 9.5 13 16
M8 20 23 32 39
M10 40 46 64 77
30.4 Tyres and tyre pressure
The recommended tyre pressure is stated in either bar or
PSI.
The following table shows standard values converted, and
also information on which tyre widths these pressures
normally apply.
* HD = high-pressure tyre
TYRE WIDTH
in mm PSI BAR
25 HD* 80 – 110 5.5 – 7.6
28 HD* 70 – 80 4.8 – 5.5
28 60 4.1
32 60 – 70 4.1 – 4.8
37 50 3.5
40 60 4.1
42 60 4.1
47 40 – 50 3.5 – 4.1
57 – 62 30 – 40 2.1 – 2.8
Note that the manufacturer's specications may dier
and must be observed as otherwise you could damage
the tyres and inner tubes.
30.5 Lighting set
Depending on which type of lighting set is tted on your
bike you may require dierent spare lamps. The following
table shows which bulbs you require.
TYPE OF LIGHTING SET USED POWER SUPPLY
Front light 6 V 2.4 W
Front light, halogen 6 V 2.4 W
Rear light 6 V 0.6 W
Rear light with stand light 6 V 0.6 W
Lighting with LED lights LED lights cannot be
replaced
Dynamo 6 V 3 W
Hub dynamo 6 V 3 W
