Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Folding Bikes Discuss the unique features and issues of folding bikes. Also a great place to learn what folding bike will work best for your needs.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 03-09-14, 07:03 PM   #1
franxico
Newbie
Thread Starter
 
Join Date: Mar 2014
Bikes:
Posts: 2
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Older Dahon Speed Pro Handlepost replacement?

Hello,

my Dahon Speed Pro, which I've bought used 3 years ago, has its handlepost hinge cracked and I need to replace it. However, I'm not sure if I can get the Radius version handlepost and if it is compatible.

My handlepost has a square base and look like this:
http://i702.photobucket.com/albums/w...psd04bf772.jpg
http://i702.photobucket.com/albums/w...ps6cf87bc8.jpg

I think I might have a Dahon Handlepost 2004 (pre- Ahead style) which is discontinued. Can anyone tell me if the radius handleposts are compatible?

Thank you
franxico is offline   Reply With Quote
Old 03-10-14, 10:51 AM   #2
ThorUSA
Senior Member
 
ThorUSA's Avatar
 
Join Date: Dec 2013
Location: Olney Illinois USA
Bikes: to many
Posts: 667
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 20 Post(s)
I can try to find one, but chances are pretty slim this is very very old ..
No the radius posts are unfortunately not compatible. You headset /fork stem is one inch diameter, all newer ones are 1 1/8 diameter ...
Thanks Thor
ThorUSA is offline   Reply With Quote
Old 03-10-14, 11:59 AM   #3
smallwheeler
Senior Member
 
smallwheeler's Avatar
 
Join Date: Aug 2012
Location: NYC
Bikes:
Posts: 2,257
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 63 Post(s)
you need a quill stem type assembly. you need to remove it and measure the diameter of the quill. it will be either 22.2mm or 25.4mm. then you will have the joy of trying to find a product that, A. isn't a piece of dangerous junk, and B. doesn't involve sending money to a chinese LLC, LTD and waiting 6 weeks to maybe receive the part.

here is an example:



another possible option is to use a quill stem adapter and an 1 1/8" threadless folding stem assembly. critically, the adapter you use must be the correct length and it cannot have a cap that stand proud of the 1 1/8 attachment surface. here is an example of the entire assembly:





according to this image, the quill adapter is available in 25.4 and 22.2 note that the height of the 1 1/8 (28.6) clamping surface is indicated as 30mm:



this appears to be exactly the same stem as pictured above. it would be advisable to contact this seller and inquire about purchasing a quill adapter that is correctly sized for your application (25.4 or 22.2). send them the above image to confirm. this seller uses ebay. worst case scenario if you don't receive the product you can dispute it with ebay and get your money back:

smallwheeler is offline   Reply With Quote
Old 03-10-14, 12:13 PM   #4
smallwheeler
Senior Member
 
smallwheeler's Avatar
 
Join Date: Aug 2012
Location: NYC
Bikes:
Posts: 2,257
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 63 Post(s)
Quote:
Originally Posted by ThorUSA View Post
... this is very very old ..
take note shoppers. a ten year old dahon is considered ancient with no parts available. whereas a 10 year old bike friday is considered just "broken in" with all parts compatible and available.
smallwheeler is offline   Reply With Quote
Old 03-10-14, 12:25 PM   #5
ThorUSA
Senior Member
 
ThorUSA's Avatar
 
Join Date: Dec 2013
Location: Olney Illinois USA
Bikes: to many
Posts: 667
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 20 Post(s)
Quote:
Originally Posted by smallwheeler View Post
take note shoppers. a ten year old dahon is considered ancient with no parts available. whereas a 10 year old bike friday is considered just "broken in" with all parts compatible and available.
10 years is old for me as I started to sell Dahons about 8 or so years ago, hence I dont have spares for older ones .... I am not responsible to take the slack of all other dealers in the world to order spares.
ThorUSA is offline   Reply With Quote
Old 08-24-14, 07:56 PM   #6
franxico
Newbie
Thread Starter
 
Join Date: Mar 2014
Bikes:
Posts: 2
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Dear all,

thank you so much for all your answers. I only get back now as, since my initial posting, I tried to put my dahon in the hands of two shops in order find the parts or solve the issue somehow, but with no success. Now in holidays I get back at solving this problem.

So thank you for your comprehensive solution smallwheeler, but I've found another problem. Yesterday I removed the handlepost, removed the quil stem to find that it its diameter is 24.4mm. I can't seem to find any place where I can get this part....



Furthermore, I have sent this to solder, but it seems there was a problem with the alloy or with quality of the actual soldering work as it broke off easily.

So now I'm wondering what to do next... Any sugestions? Many thanks
franxico is offline   Reply With Quote
Old 08-25-14, 04:19 AM   #7
bhkyte
Senior Member
 
bhkyte's Avatar
 
Join Date: Sep 2008
Location: York UK
Bikes: 2X dualdrive Mezzo folder,plus others
Posts: 2,803
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 10 Post(s)
Smallwheeler you are the champion of finding rare items required on the internet.

Have you considered looking for gravity waves, neutrinos, w.i.m.p.s, or further information concerning the higgs bosom frequencies......

Necular physics needs you.
You could have saved billions of pounds of research.......

Last edited by bhkyte; 08-25-14 at 04:24 AM.
bhkyte is offline   Reply With Quote
Old 08-25-14, 04:24 AM   #8
dezzie
Senior Member
 
Join Date: Dec 2013
Location: Newcastle upon Tyne
Bikes: Xootr swift, Moulton Speed, Moulton Major.
Posts: 322
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Any of these do? One at the bottom of the page looks similar - http://s442721994.e-shop.info/shop/c...aram=cid%3D%26
dezzie is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 11:51 AM.