General Tightening Torques For Screw Connections; Tyres And Tyre Pressure; Lighting Set - Bosch Drive Unit Speed Manual Original

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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
V2A /
V4A
THREAD
M4
3
M5
5
M6
8
M8
20
M10
40

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.
TYRE WIDTH
PSI
in mm
25 HD*
80 – 110
28 HD*
70 – 80
28
60
32
60 – 70
37
50
40
60
42
60
47
40 – 50
57 – 62
30 – 40
* HD = high-pressure tyre
Note that the manufacturer's specifications may differ
and must be observed as otherwise you could damage
the tyres and inner tubes.
8.8
10.9
12.9
2.7
3.8
4.6
5.5
8
9.5
9.5
13
16
23
32
39
46
64
77
BAR
5.5 – 7.6
4.8 – 5.5
4.1
4.1 – 4.8
3.5
4.1
4.1
3.5 – 4.1
2.1 – 2.8

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
Front light
Front light, halogen
Rear light
Rear light with stand light
Lighting with LED lights
Dynamo
Hub dynamo
POWER SUPPLY
6 V
2.4 W
6 V
2.4 W
6 V
0.6 W
6 V
0.6 W
LED lights cannot be
replaced
6 V
3 W
6 V
3 W
I General User Manual
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