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  1. #1
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    8 speed IGH on Dahon Curve D3 ??

    hi all,

    has anyone tried replacing the 3 speed IGH on a Curve ? i am thinking on changing it into an 8 speed or 5 speed IGH. is this possible ? any idea ?

    thanks a lot,
    vic

  2. #2
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    It is possible. There is an old post about someone installing a sturmey archer 8 igh into her Curve D3 (I think 07 model). It is doable, but you just need to measure the dropout spacing to make sure the hub you want to install will fit. Apart from that you also need to be careful on the size of the sprocket and chainring, because it will rub the frame if they are too big. Right now I have a 52t chainring and a 13t cog and is just perfect. I will recommend a SA 8 ( (w) version if you can find one) or an sram p5. The alfine/nexus are good too and you can respace them, but the gearing is too low with those hubs imho. I am thinking of doing this too if I don't sell my curve d3.

  3. #3
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    Quote Originally Posted by Joako View Post
    I am thinking of doing this too if I don't sell my curve d3.
    any reason why you are going to sell your curve ? not riding folders anymore ?

  4. #4
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    Sturmey 5/Sram P5 are both great options with the stock 13t sprocket.

    Sturmey 8W may be a good choice if you can make its 20t sprocket fit. You'll likely want a smaller chainring to go with it as well to keep gearing reasonable.
    Internal Gear Hub Guru
    Currently owned hubs: Sachs Pentasport, SRAM P5 Drum, Sturmey SRF5-W , Sturmey XRD3
    Previously owned hubs: Shimano Nexus 8 speed, Sturmey AW 3 speed, Shimano 3 speed coaster, SRAM S7 Drum, Sturmey XRF8 8 speed
    Tested hubs: SRAM i-Motion 9 speed, Sturmey XRD5

  5. #5
    Senior Member
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    Quote Originally Posted by K6-III View Post
    Sturmey 5/Sram P5 are both great options with the stock 13t sprocket.

    Sturmey 8W may be a good choice if you can make its 20t sprocket fit. You'll likely want a smaller chainring to go with it as well to keep gearing reasonable.
    so is putting a smaller chainring a better upgrade than a 53T one ? currently the curve has a 46T chainring. will a 42T better to add than 52T ?

    thanks,
    vic

  6. #6
    transport, not sport.
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    I saw someone done this to his curve.
    he put alfine 8speed.
    seems fine,
    but I seriously doubt it, that he didn't have to "force" the dropouts.
    the rear spacing of a curve seems not wide enough to accomodate the alfine.
    or I may be wrong.
    because he did that to a curve SL, not a d3.
    anyone know if the rear spacing of an sL is wider than d3?

  7. #7
    Senior Member
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    Depends of the year of the Curve SL. If it originally came with Sturmey 5, it should have 120mm spacing. The special 8 speed Nexus used on the 2008 Curve SL seemed to be no wider than 123mm.
    Internal Gear Hub Guru
    Currently owned hubs: Sachs Pentasport, SRAM P5 Drum, Sturmey SRF5-W , Sturmey XRD3
    Previously owned hubs: Shimano Nexus 8 speed, Sturmey AW 3 speed, Shimano 3 speed coaster, SRAM S7 Drum, Sturmey XRF8 8 speed
    Tested hubs: SRAM i-Motion 9 speed, Sturmey XRD5

  8. #8
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    Quote Originally Posted by vmaniqui View Post
    so is putting a smaller chainring a better upgrade than a 53T one ? currently the curve has a 46T chainring. will a 42T better to add than 52T ?

    thanks,
    vic
    Leave your stock chainring. With a 5 speed hub, you won't even need to change cogs. If you choose Sturmey 8, you'll want to start with your chainring and a 20t cog.
    Internal Gear Hub Guru
    Currently owned hubs: Sachs Pentasport, SRAM P5 Drum, Sturmey SRF5-W , Sturmey XRD3
    Previously owned hubs: Shimano Nexus 8 speed, Sturmey AW 3 speed, Shimano 3 speed coaster, SRAM S7 Drum, Sturmey XRF8 8 speed
    Tested hubs: SRAM i-Motion 9 speed, Sturmey XRD5

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