Go Back  Bike Forums > Bike Forums > Classic & Vintage
Reload this Page >

French thread?

Search
Notices
Classic & Vintage This forum is to discuss the many aspects of classic and vintage bicycles, including musclebikes, lightweights, middleweights, hi-wheelers, bone-shakers, safety bikes and much more.

French thread?

Thread Tools
 
Search this Thread
 
Old 09-15-12, 06:09 PM
  #1  
still climbing
Thread Starter
 
Oostal's Avatar
 
Join Date: Aug 2010
Location: Europe
Posts: 279

Bikes: vintage steel bikes

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
French thread?

Hi all,
I just picked up a mid 90s LOOK steel frame. I need to find a proper headset and am not sure about the thread and type to look for. I noticed that on the back side of the steerer tube there is a vertical section without threads. It is about 4mm wide I think and has sharp borders with the threaded part that is next to it, like: ==___==
It does not seem to be much deeper than the deeper parts of the neighboring threads and has flat bottom. Is this typical of French threading? Thanks a lot!
Oostal is offline  
Old 09-15-12, 06:40 PM
  #2  
car dodger
 
norskagent's Avatar
 
Join Date: Aug 2005
Location: garner/raleigh nc
Posts: 3,439
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 49 Post(s)
Liked 146 Times in 61 Posts
that could be french, my zeus is like that and it is french threaded. But so is my Mclean, and it is english threaded. Try screwing an english locknut (gently) and back it off if it doesn't screw on easily. Velo Orange has a cheap french headset, it's pretty plain but works fine on my zeus.
__________________
1989 Schwinn Paramount OS
1980 Mclean/Silk Hope Sport Touring
1983 Bianchi pista
1976 Fuji Feather track
1979 raleigh track
"I've consulted my sources and I'm pretty sure your derailleur does not exist"
norskagent is offline  
Old 09-15-12, 06:51 PM
  #3  
Full Member
 
Tulok's Avatar
 
Join Date: May 2009
Location: Logan, UT
Posts: 418
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 47 Post(s)
Liked 20 Times in 17 Posts
Didn't read the 90's part. Probably not French

Last edited by Tulok; 09-15-12 at 11:19 PM.
Tulok is offline  
Old 09-15-12, 10:40 PM
  #4  
French threaded
 
PDXaero's Avatar
 
Join Date: Aug 2008
Location: Portland, OR.
Posts: 1,199

Bikes: many

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 4 Times in 4 Posts
Mid 90s?
I highly doubt it is french threaded.
The flat relief you are talking about is not specific to any threading, I have seen it on ISO and french thread.
PDXaero is offline  
Old 09-15-12, 11:07 PM
  #5  
Senior Member
 
Chombi's Avatar
 
Join Date: Jul 2009
Posts: 11,128

Bikes: 1986 Alan Record Carbonio, 1985 Vitus Plus Carbone 7, 1984 Peugeot PSV, 1972 Line Seeker, 1986(est.) Medici Aerodynamic (Project), 1985(est.) Peugeot PY10FC

Mentioned: 22 Post(s)
Tagged: 0 Thread(s)
Quoted: 150 Post(s)
Likes: 0
Liked 34 Times in 27 Posts
+1^^
French threading pretty much died out on bikes after the mid 80's.....most likely English......

Chombi
Chombi is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Narhay
Classic & Vintage
31
03-18-17 12:29 PM
uncle uncle
Classic & Vintage
7
01-31-15 09:01 AM
rdaguirre
Bicycle Mechanics
8
01-28-10 02:38 PM
Bear cub
Classic & Vintage
9
12-27-09 02:20 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



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.