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Old 07-24-09, 10:49 AM   #1
vmaniqui
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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
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Old 07-24-09, 02:34 PM   #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.
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Old 07-24-09, 02:45 PM   #3
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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 ?
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Old 07-24-09, 03:30 PM   #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.
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Old 07-24-09, 04:17 PM   #5
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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.
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
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Old 07-28-09, 07:48 PM   #6
tedi k wardhana
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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?
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Old 07-29-09, 02:00 AM   #7
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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.
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Old 07-29-09, 02:03 AM   #8
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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.
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