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 specified by the manufacturer, the fol-
lowing tightening torques (average values) apply depend-
ing on the screw grade:
GRADE
THREAD
V2A /
V4A
8.8
10.9
12.9
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 specifications may differ
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 fitted on your
bike you may require different 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
