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  1. #1
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    Newer Hollowgram Si crank arms on older SL spindle?

    Hi there-
    About to make a jump to a Stages Si powermeter on my 2012 Scalpel 29, but, have a pre 2014 older style Hollowgram SL. Can the newer Si arms fit on the older spindle? The newer ones pattern looks awfully similar. My plan is to keep the existing drive side, but, upgrade the NDS. Not sure if this is possible.

    Will there be any spacing issues? I know the arms aren't the same and there's a slight Q-factor difference between the two, but, I can overcome that with shifting my cleat inwards on the left side.

    Any info is appreciated.

  2. #2
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    I had to order a new, wider spindle from Cannondale to use my Stages crank arm with my 2012 Scalpel 1. There just wasn't quite enough clearance for the battery against the non-drive side stay with the old spindle.

  3. #3
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    Good to know.

    My main question though is the new spindle compatible with the older style SL crank arms. I just want to know if I need to buy a newer si/sisl2 drive side arm as well, or if I can use my current "older" SL style.

  4. #4
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    Your older drive side crank arm will be compatible. No need to buy a new drive side arm. I'm running my old SL arm on a new spindle.

  5. #5
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    Quick update. I just got my new "2nd Generation" Si Stges in, and have mounted it. It fits pretty close, but, there's still a bit of room there. I'll post a photo later.

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