How much torque to use on carbon parts?

lefthooker · 22-09-2010 09:56AM #1

Hi all.
I bought a bike over the weekend & there are a few carbon parts on her. I need to make a few adjustments before I take it for a spin. My question is, using a torque wrench, what's a safe level to tighten carbon parts to without cracking the carbon?

crashoveroid · 22-09-2010 10:13AM

lefthooker wrote: »

Hi all.
I bought a bike over the weekend & there are a few carbon parts on her. I need to make a few adjustments before I take it for a spin. My question is, using a torque wrench, what's a safe level to tighten carbon parts to without cracking the carbon?

Most parts will have it printed on the parts.

victorcarrera · 22-09-2010 01:55PM

Try the manufacturer's web site first.
Here is a sample from the Planet X site.
Torque Settings?

These are our recommended torque settings for our carbon frames.

SL Pro Carbon Road Seat Clamp: 5.8Nm to 8Nm
SL Pro Carbon Road Front Mech Clamp: 3.5Nm
SL Pro Carbon Road Fork Steerer to Stem Clamp: 5Nm to 8Nm

Stealth Seat Clamp 6Nm to 9Nm
Stealth Carbon Fork Steerer to Stem Clamp: 5Nm to 8Nm
Stealth Carbon Handlebar Clamp: 5Nm to 8Nm
Stealth Carbon Arm Rest/Extension Clamps: 3.5Nm

For the metal on metal bits try here.
http://www.parktool.com/repair/howtos/torque.pdf

lefthooker · 22-09-2010 02:49PM

Thanks for the advice lads. I have checked the parts but there's no clear indications.
At a glance it seems between 5-8Nm is the general rule but I'll check manufacturers sites for a definitive answer

How much torque to use on carbon parts?

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