Dahon Speed Hot Rod (pic)
I have been working on an old Dahon Speed for awhile.
I already own a Twenty. The Dahon will do exactly the same thing BUT the folded size is smaller. Since i own a small Jeep (Tracker) and my folding need is more of the car boot type than train/bus type, it will handle the job alright for me.
Please take a look at:
It is not completed but right now:
- Rear derailler hanger
- Rear rack braze-on
- Front derailler braze-on hanger with a Campy derailler
- 2 bottle cages mount on frame tube
- Replacement of folding handle by an allen bolt to get a positive clamp and no more noise
- Removable and non-folding handle post for a stiffer handlebar setup
More to come!
Raleigh20 PugFixie, Merc
Sweet mods... Love the 'ratbike' burnt paint too (Yes I do know you'll treat it to a nice powdercoat when it's finished )
I like the new engineering on the clamp fold.
I like the rat look too!
Yes, when all is done, i will powdercoat it.
The clamp thing was not really good at first. Dahon have better system now.
This one was not effective. Tight enough and i was not able to open it. Loose enough to open it and it was noisy and flexy. With this bolt setup, it is stiff and silent.
Only question is: since the head tube is really short and headset is 1 inch, will i got problem in the long run?
I will use good quality cartridge headset but is it a problem?
It is a fun project. If i was giving me 20$/hour to do the job, it would be better to buy a Bikefriday!
So you did all the brazing yourself?
Why not just go with the Sram 3/9 ?
So how did you replace the handle post? I assume it now works like a Swift's -- i.e. pop a quick release and tug it off, which I guess will make it stronger but would compromise the fold....
From what little I understand, IH's are bullet-proof, but extremely difficult to fix if something breaks inside the hub, and a little less efficient to ride. Bike Friday uses a lot of the SRAM DualDrives so I assume they work pretty well. People do use them -- mostly for kids' bikes really -- so when a mechanic says "I never had to work on a hub in 10 years" it sounds like an accidental testament to their mechanical robustness...
I do all brazing myself.
I have built several recumbent bikes and customized a few frames.
The 3 * 9 is interesting. The 3 * 7 seem to work well on my girlfriend bike. I don't like the weight AND i know little about internal hub. I would not like to be stuck in one gear and not knowing what to do (principally on the road). I have been a bike mechanic for 10 years but we didn't have to work on one internal hub. Really few people ride them anymore in my area (ok far east in Quebec province). I am really open to internal hub but i would need to learn a lot of things on them. Right now, i prefer what i know.
Originally Posted by Bacciagalupe
It is really similar to Swift design.
I prefer stronger with less convenient fold for my use.
I will build a custom front rack a bit similar to BF and may had something (thread) to receive a top plate.