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  1. #1
    LET'S ROLL 1nterceptor's Avatar
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    Single chainring swap

    Just uploaded my latest video. Changed the original 44T chain ring/wheel on my folder
    to a 39T Dura Ace. Probably old news to most of you; but maybe helpful to a new rider.

    https://www.youtube.com/watch?v=5AT6...6zPoymgKaIoDLA

  2. #2
    coprolite fietsbob's Avatar
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    yea, step 1 .. have only bought the bike in the last year.. so it's the new spider crank,
    as the other previously , the chainring is swaged on to the crank.

    I like Surly's stainless steel rings on single speed drivetrains .
    not even much weight penalty in a 130-39t size
    [I see measuring weight was the first highlight.]

    and they can be flipped over to wear twice as long..

    flat S-A hub cogs you can do that too .
    Last edited by fietsbob; 03-12-14 at 03:26 PM.

  3. #3
    LET'S ROLL 1nterceptor's Avatar
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    Quote Originally Posted by fietsbob View Post
    yea, step 1 .. have only bought the bike in the last year.. so it's the new spider crank,
    as the other previously , the chainring is swaged on to the crank.

    I like Surly's stainless steel rings on single speed drivetrains .
    not even much weight penalty in a 130-39t size
    [I see measuring weight was the first highlight.]

    and they can be flipped over to wear twice as long..

    flat S-A hub cogs you can do that too .
    Yes, this is only useful for 2013 and later B'tons.
    But some folks with other folders that has a spider
    crank might find this info useful. Thanks for the
    info on Surly chain rings; will check them out if
    they have the right BCD. And don't worry, if you
    have a 2012 and earlier Brompton - I still got you
    covered :

    https://www.youtube.com/watch?v=hYo8...6zPoymgKaIoDLA

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