Go Back  Bike Forums > Bike Forums > Folding Bikes
Reload this Page >

Headset clearance

Notices
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.

Headset clearance

Old 09-04-17, 06:17 AM
  #1  
Full Member
Thread Starter
 
Join Date: Jan 2017
Location: New England
Posts: 433

Bikes: 1987 Cannondale SR600/BioPace, 1991 Cannondale Road Tandem,1994 Giant Iguana MB, 2009 Airnimal Chameleon, 2016 Dahon Vybe C7A

Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 121 Post(s)
Liked 100 Times in 63 Posts
Headset clearance

My Dahon Vybe has the standard front mounting holes (3 hole pattern ), but only the upper and middle are threaded.

My question is if I pull the front headset apart, is there enough clearance inside the tube to slide a nut in so I have something to screw into?
kayakindude is offline  
Old 09-04-17, 02:53 PM
  #2  
Full Member
Thread Starter
 
Join Date: Jan 2017
Location: New England
Posts: 433

Bikes: 1987 Cannondale SR600/BioPace, 1991 Cannondale Road Tandem,1994 Giant Iguana MB, 2009 Airnimal Chameleon, 2016 Dahon Vybe C7A

Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 121 Post(s)
Liked 100 Times in 63 Posts
I picked up a tap and thread set, 5m thread, and am going to attempt to create threads in the pre-existing hole.

This is my first "ding" concerning this Dahon product because there is no excuse to only thread two out of three holes.

This seems to be a better option than ripping the headset apart.
kayakindude is offline  
Old 09-04-17, 04:47 PM
  #3  
Member
 
Join Date: Dec 2005
Location: Sydney
Posts: 38

Bikes: Brompton-Vostok, Cannondale Hooligan, BF Fixie, Litespeed OBED, Cannondale Badboy

Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 11 Post(s)
Liked 2 Times in 1 Post
Perhaps the hole was missed and not tapped in the factory?
MultiplexMan is offline  
Old 09-04-17, 06:28 PM
  #4  
Full Member
Thread Starter
 
Join Date: Jan 2017
Location: New England
Posts: 433

Bikes: 1987 Cannondale SR600/BioPace, 1991 Cannondale Road Tandem,1994 Giant Iguana MB, 2009 Airnimal Chameleon, 2016 Dahon Vybe C7A

Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 121 Post(s)
Liked 100 Times in 63 Posts
Originally Posted by MultiplexMan
Perhaps the hole was missed and not tapped in the factory?
That's all I can think of. I threaded the hole with mixed results. The screw would not go in without a lot of force, it's almost all the way in and is at a slight angle, but holding tight. Not perfect but it's the bottom screw below the Brompton block, so hopefully it suffers less stress than the top hole.
kayakindude is offline  
Old 09-04-17, 07:44 PM
  #5  
Senior Member
 
downtube's Avatar
 
Join Date: Sep 2005
Location: Greensboro, NC
Posts: 1,498

Bikes: Many Downtube Folders :)

Mentioned: 11 Post(s)
Tagged: 0 Thread(s)
Quoted: 282 Post(s)
Likes: 0
Liked 24 Times in 17 Posts
Clearly that was a mistake at the factory.

Thanks
Yan
__________________
Designer of Downtube Folding Bike
Ph.D. Temple University ( Math )
Biked across the USA twice
Semi-active chess player ( two time Bahamas National Champion )
Sivananda ( Bahamas ) Trained Yoga instructor ( 2013 ) and ThetaHealer since 2013
Bicycle delivery worker for Jimmy John's. Delivering is the best workout I have ever had.
downtube is offline  
Old 09-04-17, 08:56 PM
  #6  
Senior Member
 
sweeks's Avatar
 
Join Date: Sep 2004
Location: Chicago area
Posts: 2,541

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

Mentioned: 22 Post(s)
Tagged: 0 Thread(s)
Quoted: 978 Post(s)
Liked 574 Times in 395 Posts
Originally Posted by kayakindude
My Dahon Vybe has the standard front mounting holes (3 hole pattern ), but only the upper and middle are threaded.
Do you have the accessory that is meant to attach to the head tube? Sometimes there is a peg for location or additional support; this wouldn't need a threaded hole.
And... why would three threaded holes be needed anyway? That would seem to be a strange design, as two bolts would provide attachment and resistance to rotation.
I couldn't find any images of the attachment mechanism on the Dahon site, so I could be wrong.
Steve
EDIT: If the unthreaded hole is on one end, it might be for a peg so the attachment can only be installed one way. Just thinkin' out loud...
sweeks is offline  
Old 09-05-17, 07:49 AM
  #7  
Full Member
Thread Starter
 
Join Date: Jan 2017
Location: New England
Posts: 433

Bikes: 1987 Cannondale SR600/BioPace, 1991 Cannondale Road Tandem,1994 Giant Iguana MB, 2009 Airnimal Chameleon, 2016 Dahon Vybe C7A

Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 121 Post(s)
Liked 100 Times in 63 Posts
The middle hole was just holding the cover in. The 2 holes used to attached accessories are holes 1 and 3. The adapter fit perfectly over them. I added the Brompton block and a buddy loaned me a bag to test. It has a little bit of side to side wiggle but that could be the fit with the adapter. Will add some weight and see how it holds up on the way back from work. It is odd at best that Dahon would provide the holes needed to add attachments and only thread one of them.
kayakindude is offline  
Old 09-05-17, 12:50 PM
  #8  
Banned
 
Join Date: Dec 2013
Location: Olney Illinois USA
Posts: 1,021

Bikes: to many

Mentioned: 18 Post(s)
Tagged: 0 Thread(s)
Quoted: 213 Post(s)
Likes: 0
Liked 1 Time in 1 Post
they are not really designed for the Brompton stuff ... hence the middle hole doesn't do anything. Having said that the bikes I inspected had threads in all 3 holes
thor
ThorUSA is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
CanadaWriter
Folding Bikes
2
05-22-18 10:40 AM
Diode100
Folding Bikes
6
07-05-16 09:33 AM
DosWheelsBtr
Bicycle Mechanics
3
02-17-15 10:15 PM
santookie
Folding Bikes
6
06-11-14 04:11 PM
Oostal
Bicycle Mechanics
1
04-28-14 04:06 PM

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service -

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.