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Old 07-13-08, 02:30 AM   #1
pengyou
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Dahon speed - installing a front derailler?

I would like to have a little bit of a lower 1st gear and little bit of a higher 7th gear but I like the spread of the gears that I have. Rather than messing up the cassette is it possible to install a front derailler and have 2 gears - or even 3? I don't need 3 at this point but I am working now on putting a motor (chain driven on the rear) and if I do I may very well need a higher high gear - the third ring may be desirable. I know that they sell clamp on deraillers but I think I would have to make the crank wider - maybe as much as 1/2 to 3/4". Is this possible? Is it possible to add a 3 speed hub gear on the rear and get it to work with the 7 speed cassette - creating 21 speeds? It seems like this would be a lot less messy and would not interfere so much with folding the bike or the chain line.

What r the limits?

Last edited by pengyou; 07-13-08 at 02:53 AM.
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Old 07-13-08, 01:34 PM   #2
mtb29
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Check thorusa he has front deraileur mounts for Dahons.
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Old 07-13-08, 02:09 PM   #3
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Quote:
Originally Posted by pengyou View Post
I would like to have a little bit of a lower 1st gear and little bit of a higher 7th gear but I like the spread of the gears that I have. Rather than messing up the cassette is it possible to install a front derailler and have 2 gears - or even 3? I don't need 3 at this point but I am working now on putting a motor (chain driven on the rear) and if I do I may very well need a higher high gear - the third ring may be desirable. I know that they sell clamp on deraillers but I think I would have to make the crank wider - maybe as much as 1/2 to 3/4". Is this possible? Is it possible to add a 3 speed hub gear on the rear and get it to work with the 7 speed cassette - creating 21 speeds? It seems like this would be a lot less messy and would not interfere so much with folding the bike or the chain line.

What r the limits?
Which dahon speed do you have? The P8? TR? PRO? D3? D7?
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Old 07-14-08, 06:25 AM   #4
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I think it is the D7 - it is the low end with the chromoly frame and 7 speed cassette.
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Old 07-14-08, 07:35 AM   #5
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speed frame is speed frame and the front derrailleur hanger should fit.
check it out here :
http://www.thorusa.com/dahon/accessories/special.htm

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Old 07-14-08, 08:06 AM   #6
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I'm currently trying to put a 52-42-30 triple on my KHS Westwood. I have a 105 FD but find that the removable clamp band is too high and I don't have enough tube to fit it to. Would this Dahon Hanger do the trick for me, assuming that tube diameter is the same (the KHS is 31.8, I believe)?
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