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-   -   Does a Carbon Fiber Seatpost for Dahon Bikes Exists ?? (http://www.bikeforums.net/folding-bikes/687989-does-carbon-fiber-seatpost-dahon-bikes-exists.html)

vmaniqui 10-15-10 02:11 PM

Does a Carbon Fiber Seatpost for Dahon Bikes Exists ??
 
hi all,

has anyone updated their dahon seatpost with carbon fiber ? i searched and googles but couldn't find a carbon fiber seatpost with 34x600mm measurement. anyone know where to get one ? closest one is this : http://www.speedmatrixdepot.com/cata...roducts_id=198

but still 2 inches short though.

thanks,

bhkyte 10-15-10 02:36 PM

A dahon beam seatpost combi is pretty light.

vmaniqui 10-15-10 02:50 PM

Quote:

Originally Posted by bhkyte (Post 11628213)
A dahon beam seatpost combi is pretty light.

i checked out that one but you'll be limited to their saddle and can't use any other saddle brand.

intheways 10-15-10 03:00 PM

I've heard of one report of someone receiving a partial colectomy from a carbon seatpost. Ugh!

YMMV

vmaniqui 10-15-10 03:14 PM

Quote:

Originally Posted by intheways (Post 11628311)
I've heard of one report of someone receiving a partial colectomy from a carbon seatpost. Ugh!

YMMV

yes. i have read all these bad reviews about a broken carbon fiber. i was hoping that's my only option since i can't find a lighter alloy or alum seatpost that will fit the dahon.

AEO 10-15-10 03:37 PM

there's a possibility for using a shim or telescoping section for the dahon.

BruceMetras 10-15-10 04:20 PM

Vic, you should know by now, just ask me..:lol: of course Dahon carbon seatposts exist.. I have two in the shop.. are they the lightest, no, the brand new Kore that I have here is lighter.. with the cute little adapter, you can run any saddle you'd like.. also, I have the SDG I-Beam seat/seatpost combo ... lightness spoken here .. :lol:

Bacciagalupe 10-15-10 04:30 PM

IMO a CF seatpost on a folder is a terrible idea.

Unlike aluminum or steel, CF components can only tolerate a certain amount of torque. Tighten the seatpost QR too much, and it won't be long before you'll crack the CF seatpost.

vmaniqui 10-15-10 04:41 PM

Quote:

Originally Posted by Bacciagalupe (Post 11628665)
IMO a CF seatpost on a folder is a terrible idea.

Unlike aluminum or steel, CF components can only tolerate a certain amount of torque. Tighten the seatpost QR too much, and it won't be long before you'll crack the CF seatpost.

Make sense as we normally wants the tightest possible grip to avoid seatpost slippage. Guess CF is out of the question now.

chagzuki 10-15-10 05:14 PM

The SDG I-beam saddle, Bel Air or whatever it's called is only about 200g whereas a railed version is nearer 300g. I've got the total weight of the SDG seat post and saddle at 600g. That's way lighter than the post-pump seat post on it's own and only a few grams heavier than the standard non-pump seat post. I think the Kore I-Beam set up is a little heavier, so I'd say that if you like SDG saddles try to find that version somewhere (might be hard to get hold of).

chagzuki 10-15-10 05:20 PM

I also found that the SDG seat post flexes in a way that I like, i.e. quite a lot. Some may hate it but I found it softened the ride. The Bel Air saddle is very flexy at the tail and again I found this very comfortable. The central region of the saddle where it joins the seat post with the I-Beam bracket is a different story - unforgivingly hard. The Formula FX saddle remedies this but isn't worth the extra price tag IMO.

chagzuki 10-15-10 05:35 PM

Or if you want to go with Kore there's a rail adapter for railed saddles. Dunno how much weight it adds/whether it undermines the benefit of the seat post.

vmaniqui 10-15-10 05:51 PM

Quote:

Originally Posted by chagzuki (Post 11628968)
Or if you want to go with Kore there's a rail adapter for railed saddles. Dunno how much weight it adds/whether it undermines the benefit of the seat post.

that's the only drawback this the KORE. you can't use a regular saddle unless you have the adapter. i wonder what they we're thinking when they built this special seatpost. wrong marketing strategy.

chagzuki 10-15-10 05:54 PM

Do you have it already or do you mean it's the only I-Beam product available in stores?

vmaniqui 10-15-10 05:56 PM

Quote:

Originally Posted by chagzuki (Post 11629074)
Do you have it already or do you mean it's the only I-Beam product available in stores?

i meant the I-Beam Kore seatpost. http://us.dahon.com/node/89

chagzuki 10-15-10 05:58 PM

Yeah, but I'd think SDG versions must crop up on ebay fairly regularly, or there might be someone on these forums who has one to sell / exchange.

jur 10-15-10 08:01 PM

Quote:

Originally Posted by vmaniqui (Post 11628089)
hi all,

has anyone updated their dahon seatpost with carbon fiber ? i searched and googles but couldn't find a carbon fiber seatpost with 34x600mm measurement. anyone know where to get one ? closest one is this : http://www.speedmatrixdepot.com/cata...roducts_id=198

but still 2 inches short though.

thanks,

I have that one on my Swift.
http://i160.photobucket.com/albums/t...c/IMG_2671.jpg

BruceMetras 10-15-10 09:39 PM

Quote:

Originally Posted by jur (Post 11629618)

Hi Jur, how did you build your rear wheel? Do you have any closeup shots? 28h rim?

tedi k wardhana 10-15-10 11:31 PM

Quote:

Originally Posted by vmaniqui (Post 11629050)
that's the only drawback this the KORE. you can't use a regular saddle unless you have the adapter. i wonder what they we're thinking when they built this special seatpost. wrong marketing strategy.

available here in jakarta. around 50 bucks. adapter INCLUDED.

tedi k wardhana 10-15-10 11:33 PM

@ jur: is that pazzaz? some friends here have that. 34mm. not sure about the length. maybe not 600mm

vmaniqui 10-16-10 12:24 AM

Quote:

Originally Posted by tedi k wardhana (Post 11630255)
@ jur: is that pazzaz? some friends here have that. 34mm. not sure about the length. maybe not 600mm

it is a pazazz and in 400mm length only.

vmaniqui 10-16-10 12:29 AM

i found these online - a titanium seatpost for birdy and dahon ????

http://wworks.pixnet.net/blog/post/26664038

jur 10-16-10 12:30 AM

Quote:

Originally Posted by BruceMetras (Post 11629973)
Hi Jur, how did you build your rear wheel? Do you have any closeup shots? 28h rim?

It's a simple enough build; 28H American Classic 205 hub & Sun Ringle Assault SL rim, 21 spokes laced, every second one on non-drive not laced. Non-drive side radial, drive side 2-cross. I have done about 3-400km on it now and am pleased with the result.

Tedi: Yes that is the 34mm Pazzazz seatpost. I got it from Speedmatrixdepot. I use it in conjunction with some Ritchey Liquid Torque anti-slip grease which is necessary.

Clownbike 10-16-10 05:37 PM

Dahon did make a CF post for the Helios XX anniversary model that used a standard seat mount. Probably rare as hen's teeth now. Wonder if Thor has one rattling about the barn.

fietsbob 10-16-10 06:50 PM

a source of carbon fiber tube, sheet, plate, etc.. http://dragonplate.com/default.asp.. for your own projects.

carbon lined aluminum tube, with a conventional seatpost, sleeved in the top, presents an Option..


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