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.

Extending Dahon reach

Reply

Old 11-08-17, 09:46 AM
  #1  
kayakindude
Senior Member
Thread Starter
 
Join Date: Jan 2017
Location: New England
Posts: 133

Bikes: 1987 Cannondale SR600/BioPace, 1994 Giant Iguana MB, 2009 Airnimal Chameleon, 2016 Dahon Vybe C7A

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 37 Post(s)
Extending Dahon reach

Hello,

Brompton has a seat extender and I was wondering if Dahon has something similar or an aftermarket. I am 6'3 and am used to the reach but think of extending without adding more to the handlebar and going with the seatpost instead. Have my bar ends already.

Thanks
kayakindude is offline  
Reply With Quote
Old 11-08-17, 11:43 AM
  #2  
sweeks
Senior Member
 
sweeks's Avatar
 
Join Date: Sep 2004
Location: Chicago area
Posts: 1,105

Bikes: Airborne "Carpe Diem", Trek 6000, Strida 2, Dahon "Helios XL", Dahon "Mu XL", Tern "Verge S11i"

Mentioned: 13 Post(s)
Tagged: 0 Thread(s)
Quoted: 471 Post(s)
Originally Posted by kayakindude View Post
... I was wondering if Dahon has something similar or an aftermarket. I am 6'3 and am used to the reach but think of extending without adding more to the handlebar and going with the seatpost instead.
I'd recommend contacting Thor (thorusa.com). He's very knowledgeable about Dahons.
Steve
sweeks is offline  
Reply With Quote
Old 11-08-17, 01:51 PM
  #3  
ThorUSA
Banned
 
Join Date: Dec 2013
Location: Olney Illinois USA
Posts: 1,047

Bikes: to many

Mentioned: 18 Post(s)
Tagged: 0 Thread(s)
Quoted: 213 Post(s)
blush .... thanks
yup ABer Hallo will work or litepro thor
ThorUSA is offline  
Reply With Quote
Old 11-08-17, 02:11 PM
  #4  
kayakindude
Senior Member
Thread Starter
 
Join Date: Jan 2017
Location: New England
Posts: 133

Bikes: 1987 Cannondale SR600/BioPace, 1994 Giant Iguana MB, 2009 Airnimal Chameleon, 2016 Dahon Vybe C7A

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 37 Post(s)
Hi Thor- right those will extend the handle bar...I am talking about opening the reach by bring the seat back 2 or 3 inches.
kayakindude is offline  
Reply With Quote
Old 11-08-17, 02:37 PM
  #5  
Joe Remi
Senior Member
 
Join Date: Jan 2010
Location: NorCal
Posts: 1,127

Bikes: Haibike Sduro Trekking SL, Rivendell Appaloosa, Concinnity singlespeed, KHS mini velo (Japan market), Trident Spike trike

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 477 Post(s)
Originally Posted by kayakindude View Post
Hi Thor- right those will extend the handle bar...I am talking about opening the reach by bring the seat back 2 or 3 inches.
There are no Brompton-style seatposts for Dahons that I'm aware of. You would need a handlebar extender like Thor listed.
Joe Remi is offline  
Reply With Quote
Old 11-09-17, 11:50 AM
  #6  
tcs
Palmer
 
tcs's Avatar
 
Join Date: Mar 2007
Location: Parts Unknown
Posts: 5,382

Bikes: 1980 Mike Melton, 1982 Stumpjumper, 1982 Santana, 1984 Alex Moulton AM, 2007 Cannondale Capo, 2008 BikeFriday tikit T-11, 2010 Dawes Briercliffe, 2017 Dahon Curl i3

Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 308 Post(s)
Originally Posted by Joe Remi View Post
There are no Brompton-style seatposts for Dahons that I'm aware of.
Google, 37 seconds.

Or you could use a long setback seatpost with a telescopic seatpost.

HTH
tcs is online now  
Reply With Quote
Old 11-09-17, 12:47 PM
  #7  
Joe Remi
Senior Member
 
Join Date: Jan 2010
Location: NorCal
Posts: 1,127

Bikes: Haibike Sduro Trekking SL, Rivendell Appaloosa, Concinnity singlespeed, KHS mini velo (Japan market), Trident Spike trike

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 477 Post(s)
Originally Posted by tcs View Post
Good for you for finding setback solutions, but those aren't Brompton-style seatposts. Let the record show!
Joe Remi is offline  
Reply With Quote
Old 11-09-17, 02:42 PM
  #8  
kayakindude
Senior Member
Thread Starter
 
Join Date: Jan 2017
Location: New England
Posts: 133

Bikes: 1987 Cannondale SR600/BioPace, 1994 Giant Iguana MB, 2009 Airnimal Chameleon, 2016 Dahon Vybe C7A

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 37 Post(s)
Thanks for the feedback- yes I also searched google and amazon and saw some options for a regular bike. Just not sure if the design of the Dahon post can handle my weight shifting a few inches back? Sorry if I was not clear. Just thinking I keep a better fold by opening the cockpit by going backwards...but a long unsupported pole may be a concern?
kayakindude is offline  
Reply With Quote
Old 11-09-17, 03:31 PM
  #9  
fietsbob 
coprolite
 
fietsbob's Avatar
 
Join Date: Jun 2010
Location: NW,Oregon Coast
Posts: 37,492

Bikes: 8

Mentioned: 143 Post(s)
Tagged: 0 Thread(s)
Quoted: 5615 Post(s)
Any tube style seat post is 7/8" at the top , then a Brompton SAP, (saddle adapter pin) will go on it

and offer a horizontal tube also 7/8" /22.2mm to fit a common saddle clip upon (or the primo Brompton Pentaclip )

and have a set back adjustment along it's length, + the saddle rail adjustment along it's length..





...
fietsbob is online now  
Reply With Quote
Old 11-09-17, 03:35 PM
  #10  
Joe Remi
Senior Member
 
Join Date: Jan 2010
Location: NorCal
Posts: 1,127

Bikes: Haibike Sduro Trekking SL, Rivendell Appaloosa, Concinnity singlespeed, KHS mini velo (Japan market), Trident Spike trike

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 477 Post(s)
Originally Posted by kayakindude View Post
Thanks for the feedback- yes I also searched google and amazon and saw some options for a regular bike. Just not sure if the design of the Dahon post can handle my weight shifting a few inches back? Sorry if I was not clear. Just thinking I keep a better fold by opening the cockpit by going backwards...but a long unsupported pole may be a concern?
I can't verify that it's a real problem, but personally I agree with your concern about the physics of it. I can't remember what they call it, but Tern makes a bar extender with a quick-release so you can adjust it for folding. I had one on a Dahon Curve D3 and it was easy to use.
Joe Remi is offline  
Reply With Quote
Old 11-10-17, 10:27 AM
  #11  
L Arnold 
**thusi*st
 
Join Date: Apr 2017
Location: Boulder, CO
Posts: 218

Bikes: Specialized Touring Expedition '1984, Volagi Liscio, Dahon Visc D18, Dahon Visc SL, Schwinn Moab

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 80 Post(s)
All in all, I think Kayakindude is onto a good track wanting to extend both seat and handlebar post. You really want to be balanced.

My sense is that you would do well either with a ABer Hallo or a Touring style looped Handlebar. Below is a picture of mine on my Touring Bike that gives me a variety of hand positions and lengths.

The "Trekking" one shown has some shortcomings, primarily in that one bar component is actually short of your stem, but it does fit on most Dahons (25.4 fitting) and it has outside and far positions that can be very helpful.

I stock the Dimension and I intend to bring back the one that is on my Expedition pictured.
Attached Images
File Type: jpg
Dimension Trekking HB0099.jpg (24.8 KB, 43 views)
L Arnold is offline  
Reply With Quote
Old 11-10-17, 10:37 AM
  #12  
L Arnold 
**thusi*st
 
Join Date: Apr 2017
Location: Boulder, CO
Posts: 218

Bikes: Specialized Touring Expedition '1984, Volagi Liscio, Dahon Visc D18, Dahon Visc SL, Schwinn Moab

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 80 Post(s)
Originally Posted by kayakindude View Post
Just not sure if the design of the Dahon post can handle my weight shifting a few inches back? Sorry if I was not clear. Just thinking I keep a better fold by opening the cockpit by going backwards...but a long unsupported pole may be a concern?
This is similar to having a flatter angle on the seatpost and this does change it abit. I have a bike that has a flatter angle and I do feel the seatpost flex more. You could simulate this by trying a 20" wheel on the front of your Curve for just a bit (if it fits) and keeping 16" in the back.

I may try the inverse of that on the bike where my post flexes a bit more than I like.

I think we can definitely work through this however. Seatposts can be strengthened for one. We can also run tension members to reduce "bowflex" in the seatpost. If everything is designed right the bowflex in the seatpost should not be a problem but should actually be a feature.

My opinion today anyway.
L Arnold is offline  
Reply With Quote
Old 11-10-17, 12:49 PM
  #13  
kayakindude
Senior Member
Thread Starter
 
Join Date: Jan 2017
Location: New England
Posts: 133

Bikes: 1987 Cannondale SR600/BioPace, 1994 Giant Iguana MB, 2009 Airnimal Chameleon, 2016 Dahon Vybe C7A

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 37 Post(s)
I was mainly exploring it because after stumbling into info on the Brompton extender, it seems logical to open in both directions and as a bonus a seat extender would seem to have zero impact on the fold. My handlebar on the Vybe still folds with the Ergon threes, but only by extending the handlebar before folding to the max height to clear the magnets.
kayakindude is offline  
Reply With Quote

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


Thread Tools
Search this Thread

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service