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  1. #1
    Senior Member Winfried's Avatar
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    A couple of questions about two models from Dahon

    Hello

    I went through the Dahon global site looking for faster bikes, and have the following questions:

    Dr. Hon
    • Gear Inches 92"- 304". 304 * 0.079 = 24,016m. Can't be. Is this a typo?


    Mu P27
    • What are the gear inches?
    • SRAM 3 x 9 SPEED DUALDRIVE II (FINGER TAP SHIFTERS): How well does this derailleur + hub thingie work in practice?



    Thank you.

  2. #2
    PatronSaintOfDiscBrakes dynaryder's Avatar
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    Sheldon says the Dr is 32.3 - 94.1".

    He says the Mu is about 21 - 120.3"(crank length not given).

    Dual Drive systems work well,they just add weight and complicate wheel removal somewhat. You'll have to carry a 15mm wrench for the hub's nuts(no QR) and you'll have to pop off the shifter box. On the plus side you can shift your 'triple' at a complete stop.

    C'dale BBU('05 and '09)/Super Six/Hooligan8and 3,Kona Dew Deluxe,Novara Buzz/Safari,Surly Big Dummy,Marin Pt Reyes,Giant Defy 1,Schwinn DBX SuperSport/Qualifier,Brompton S6L,Dahon Speed Pro TT

  3. #3
    Senior Member bhkyte's Avatar
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    Hi.
    Dual drive does add a little weight, but its not as much as people often believe.
    I looked in to this using the weight weenie site and came to the conclusion it was about half a kilo heavier than a equivalent set up using a front triple.
    Dual drive Mezzo (GOLD), Dual Drive Mezzo with bullbars (black), White Brompton thingy with Dahon Androes stem and bull bars. Birdie (old sytle) 7 speed. Downtube NS8. Birdie red.

  4. #4
    PatronSaintOfDiscBrakes dynaryder's Avatar
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    I'm pretty sure it adds more than that. The rear wheel on my SPTT weighs 3lbs 11oz w/cassette. I'm not going to pull the wheel off my Mu and weigh it(it's a low spoke Kinetix so apples/oranges anyway),but there's def a big difference. A front der and triple aren't going to add that much more weight.

    C'dale BBU('05 and '09)/Super Six/Hooligan8and 3,Kona Dew Deluxe,Novara Buzz/Safari,Surly Big Dummy,Marin Pt Reyes,Giant Defy 1,Schwinn DBX SuperSport/Qualifier,Brompton S6L,Dahon Speed Pro TT

  5. #5
    Senior Member bhkyte's Avatar
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    Yes its quite hard to do a direct compairasion. But it is surprising when you add up the weight of a tripple the front mech etc.
    Dual drive Mezzo (GOLD), Dual Drive Mezzo with bullbars (black), White Brompton thingy with Dahon Androes stem and bull bars. Birdie (old sytle) 7 speed. Downtube NS8. Birdie red.

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