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Today's cycling parts use ever lighter materials such as carbon. That's why it is very important not to exceed the maximum torque when tightening the bolts and fasteners. If you exceed maximum torque, you run the risk of damaging your bike.

You can buy a tool called a torque-wrench that measures the moment that you apply to a bolt while tightening it. The device may be mechanical, or electronic.



Bolt tightening torques for Campagnolo components

Component  Torque in Nm  
Bracket  70 
Pedal Axle  40 
Crank Bolt  32-38 
Chainring bolts 
Ergopower  10 
Ergopower FB 
Rear derailleur (in frame)   15 
Rear derailleur (cable)  
Front derailleur (clamp-on version)  
Front derailleur (cable)  
Brake (pad) 
Brake (in frame)  10 
Brake (cable)  
Sprocket  50 
Saddle (bottom)  22 
Saddle clamp carbon  max 6 
Handlebar Stem  max 8 

Printable version

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