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  1. #1
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    Cannondale Flash Carbon 2009 frame and crank questions

    Dear All,

    I need some advise. I am currently riding a Cannondale Flash carbon 2009 and I am considering switching the cranks to a THM Clavicula M3 with a XX1 spider and a 36T chainring. I am however in doubt if the 36T will clear the chainstays in the frame. Anyone knows this?

    Further, do anyone know if the 2009 Cannondale Flash use the BB called BB30 or is it the Pressfit 30? My impression is BB30, but not 100% sure. Hope some experts can chip in here.

    Brgds
    Seismic

  2. #2
    Happy Trails
    Reputation: Scott In MD's Avatar
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    Cannondale Flash Carbon 2009 frame and crank questions

    BB30 (bearings press directly in machined aluminum rather than PF30, where the bearings sit in a tough Derlin insert ring that sits in machined aluminum or formed carbon.

    Since the inner diameter of the BB30 aluminum bearing mount is exactly the same as the inner diameter of the Derlin bearing mount pressed into the frame on a PF 30 bottom bracket, any BB30 crank will work fine in any BB30 or PF30 application, although there are some width shimming techniques on both that make this a job for experienced wrench rather than newbie DIYer.

    I'm not sure either way about clearance on 36teeth .... But I wouldn't want to spin that.

  3. #3
    Nor­wegr
    Reputation: Vegard's Avatar
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    A 36t barely fits my 2012 Scalpel, sadly I can't help you any further in terms of fit on your 2009 Flash.

  4. #4
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    Thank you for the input. Tired to send THM a mail, but they dont bother to answer. Anyways, looks like the BB is a BB30 on the 2009 frame and whether a 36T will then be able to fit will be to be seen.

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