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  1. #1
    mtbr member
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    Jan 2008
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    Reducer headset to carbon jekyll and angle sets?

    I'am going to go tapered fork but wondering that cannondale integrated si head tube. Can I go example normal cane creek zs49/28,6(or any other similar zero stack upper headset) headset or do I need the cannondale own reducer headset?

    Is it like, if going to non cannondale reducer headsets, stack height will rise or are there going to be any other problems? I don't need bottom headsets because of tapered fork, right?

    Also has anyone tried angle sets to jekyll? Problems?

    Many thanks already!
    My fleet:
    System six 08
    Moto 1 08
    Jekyll 1000(04)
    Perp 3 (08)

    Had R700 (05)

  2. #2
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    If the carbon frame is the same as the alloy one then the Cannondale SI bearings sit directly in the frame. These are 50.8mm outside diameter and fit a Lefty directly inside or any 1.5" steerer with a bearing seat. So for a tapered steerer you just need the top reducer (Cannondale SI --> 1 1/8th) or the whole Cannondale KP205 headset kit.

    I can't find an angleset to fit the SI (50.8mm diameter x 7mm depth) frames, try contacting Works Components in the UK as if more folk ask they might agree to make one as they claim to do custom work. It looks (as a non-engineer) to be quite a simple thing to make for this setup. Stack height would have to increase.

    edit: I was referring to the Jekyll >2011. For frames with push fit SI cups any 'traditional' 1.5" headset (49.61mm - ZS49/EC49 headtube internal diameter) will work inc. anglesets. Measure up first!

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