37
Bolted connections
It is vital that all bolted connections on
the bicycle have the correct torque in
order to ensure that they are secure.
Too much torque can damage the screw, nut
or component. Always use a torque spanner
to tighten screw joints. You are not able to cor-
rectly tighten these bolted connections with-
out this specialist tool!
If a component specifies a torque
for its bolted connections, then this
should be strictly adhered to. Please
read the instructions provided by the man-
ufacturer, which lists the correct mounting
torques.
Bolted connection
Torque
Crankset arm, steel
30 Nm
Crankset arm, aluminium
40 Nm
Pedals
40 Nm
Front wheel nut
25 Nm
Rear wheel nut
40 Nm
Stem expander bolts
8 Nm
Threadless stem clamping bolts
9 Nm
Bar ends-Clamping bolts on the
bars
10 Nm
Seat post clamping bolt M8
20 Nm
Bolted connection
Torque
Seat post clamping bolt M6
14 Nm
Seat post bar
20 Nm
Brake blocks
6 Nm
Dynamo attachment
10 Nm
Seat clamp on carbon frames
5 Nm*
Drinks bottle holder on carbon
frames
2 Nm
Differences for carbon components:
Bolted connection
Torque
Front derailleur bracket attach-
ment screw
3 Nm*
Shift lever attachment screw
3 Nm*
Brake lever attachment screw
3 Nm*
Handlebars-stem clamping
5 Nm*
Stem-fork tube clamping
4 Nm*
Screw connection
Thread
Fastening
torque,
max.
Seat clamp, loose
M 5
4 Nm*
Seat clamp, loose
M 6
5.5 Nm*
Derailleur hanger
M 10x1
8 Nm*
Screw connection
Thread
Fastening
torque max.
Bottle holder
M 5
4 Nm*
Bottom bracket
BSA
according
to manu-
facturer’s
instructions*
Brake caliper, disk
brake, Shimano (IS
and PM)
M 6
6 – 8 Nm
Brake caliper, disk
brake, AVID (IS and
PM)
M 6
8 – 10 Nm
Brake caliper, disk
brake, Magura
(IS and PM)
M 6
6 Nm
General torques for bolted connections
In general, the following torques can be used for
bolted connections:
Dimensions Screw type marking
Unit
8.8
10.9
12.9
M 4
2.7
3.8
4.6
Nm
M 5
5.5
8.0
9.5
Nm
M 6
9.5
13.0
16.0
Nm
M 8
23.0
32.0
39.0
Nm
M 10
46.0
64.0
77.0
Nm
*Use of carbon assembly paste is recommended
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