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Kinetics Brompton 8 speed conversion kit

Discussion in 'Photo Gallery' started by GrumpyGregry, 28 Oct 2011.

  1. GrumpyGregry

    GrumpyGregry Guru

    Location:
    Da 'Sham
    The Mk VI version I believe current as at October 2011

    In addition to the bits below you need new grips (I'm going with Ergon GC2 designed for Rohloff/Nexus use so assymetrical). While you are about it you might as well put some decent brake levers on, and swap the cables too, ideally to ones with cable oilers fitted.

    The wheel
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    It is an unbranded rim and comes with no rim tape. EDIT: but is otherwise identical to the factory rim.

    Now we get a little cranky...
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    The chain wheel is a tiny bit smaller than the dinner plate sized one on a standard Brompton.

    Some close ups of the Sturmey X-RF8(W) hub....

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    All the bits'n'pieces, shifter, fittings and cable

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    Various shots of the modified chain tensioner

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  2. GrumpyGregry

    GrumpyGregry Guru

    Location:
    Da 'Sham
    Has been fitted. Some comments on that process here
     
  3. GrumpyGregry

    GrumpyGregry Guru

    Location:
    Da 'Sham
    Some photos of it on the bike....

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  4. Goldie

    Goldie Well-Known Member

    I'd miss the Brompton chainset (there is something wonderful about the "borrowed from the Queen Mary's engine room" vibe that it has going on) but that looks like it'll make an already genius bike even better. Be interested to know how it rides...Does it give you a wider spread of gears or just fill in th gaps between your previous top and bottom (so to speak!)?
     
  5. GrumpyGregry

    GrumpyGregry Guru

    Location:
    Da 'Sham
    our opinions of the brompton chainset differ. Something you might find in the bins on the Queen Mary perhaps....

    what the sturmey 8 speed gives you is twistgrip driven

    Overall Range - 325%
    • Gear 1 - 100% (Direct Drive)
    • Gear 2 - 130% (Gear 1 + 30%)
    • Gear 3 - 148% (Gear 2 + 14%)
    • Gear 4 - 169% (Gear 3 + 14%)
    • Gear 5 - 192% (Gear 4 + 14%)
    • Gear 6 - 220% (Gear 5 + 14%)
    • Gear 7 - 250% (Gear 6 + 14%)
    • Gear 8 - 325% (Gear 7 + 30%)

    So a direct drive cliff climber and an overdrive top with 6 main gears in an even spread in the middle.