Diamondback Mission headset specs- Mtbr.com
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  1. #1
    mtbr member
    Join Date
    Mar 2009

    Diamondback Mission headset specs

    Attached is a scan of the FSA Gravity SX Pro No. 55 headset specifications sheet. This is the headset installed on the 2011 Mission 1,2, 3 bikes. Note the unusual lower headset spec - 54.92mm head tube ID - the standard as used by Cane Creek, Chris king, etc is 56.0mm.

    Anybody find any headsets with this spec? I am happy with mine, just like to have some options should I want to try another brand.

  2. #2
    Let the good times roll.
    Reputation: miniwisejosh's Avatar
    Join Date
    Sep 2007
    I spoke with Cane Creek on the phone about this. Only FSA and maybe a couple other companies (can't remember who) make headsets that fit the Mission. They suggested reaming the headtube to the proper diameter. Park makes tools designed specifically for that. When I asked about frame integrity, they said the amount of material removed is minimal and shouldn't make the frame unsafe.

    But that would be a lot of trouble to go through just to try another brand. I'd only do it to change geometry with Angleset or Works cups.

    Park Tool Co. 789 : 55.95mm Reamer : Frame & Fork Tools

    BTW, I don't think your attachment worked. I don't see anything.

  3. #3
    mtbr member
    Join Date
    Mar 2009


    Thanks for the valuable info. The attachment file is too large so e-mail me at [email protected] and I will send it to you or anyone interested. --

  4. #4
    Singletrack Slayer
    Reputation: DavidNeiles's Avatar
    Join Date
    May 2008
    IMO Headsets are important but not as critical as other bearings. FSA make awesome stuff and I love the products, the FSA HS on the Mission should be nothing to worry about. I have no plans on changing out untill I need to. I have CK and CC headset too. FSA is my personal favorite over the others for headset.
    ~~~~~~Singletrack Slayer~~~~~~~

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