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How much torque to use on carbon parts?

  • 22-09-2010 9:56am
    #1
    lefthooker
    Registered Users, Registered Users 2 Posts: 1,709 ✭✭✭


    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?


Comments

  • #2
    crashoveroid
    Registered Users, Registered Users 2 Posts: 911 ✭✭✭crashoveroid


    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.


  • #3
    victorcarrera
    Registered Users, Registered Users 2 Posts: 1,059 ✭✭✭victorcarrera


    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


  • #4
    lefthooker
    Registered Users, Registered Users 2 Posts: 1,709 ✭✭✭lefthooker


    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


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