Originally Posted by spambait11
Other proprietary parts include:
- integrated headsets (...)
Just to clarify, using Chris King terminology, (Integrated Headsets Explained - PDF
) the Dahon headsets would actually be classified as "internal" or "semi-integrated" headsets. They would not
be classified as "integrated".
To quote Chris King,
"The key difference between integrated and internal is that the bearings do not touch the frame with an internal headset, they are contained either by a cup or an aluminum or plastic shim assembly which is pressed into the headtube."
All the recent Dahon 20" models that I am aware of use either steel or aluminum cups for the bearings.
Best bet for the least proprietary Dahon might be a Speed P8. No internal gear hubs, no fancy wheels, no suspension, nice steel frame and steel fork.
On the P8 models we own (Speed + Helios), the brake levers are bog standard Avid's, and derailleurs + shifters are standard SRAM kit. Cassette/BB/cranks/chain all seem to be pretty standard stuff. If one is really paranoid about parts availability 5 years down the road, one could buy some extra components now.. about $100 will get you:
- lower handlepost section = $50
- seatpost (telescoping) = $22
- front wheel with 74mm hub (Dahon Kinetix Comp) = $30
Everything else beyond the frame/fork should be fairly easy to deal with. The most non-standard is probably the 74mm hub, there's not an awful lot of options that I have found. It seems you have Dahon, Pantour, American Classic and Rolf who make/made a 74mm hub in one guise or another. It is possible to go to 100mm hub, it just means you need a model with a steel fork and you need it cold-set (i.e. spread) to match. Some folks say don't do it, some people have done it without problems. You make up your own mind. (And get a professional to do it... http://sheldonbrown.com/frame-spacing.html
BTW, it's "SDG" (speed defies gravity) not IDG. Yes Dahon is moving away from SDG it seems.
2008 should see introduction of the Kore seatposts that will take I-Beam or with a Kore adapter, standard railed saddles. However, you can purchase posts today that will take a standard saddle, should you choose a model that has I-Beam by default.