Go Back  Bike Forums > Bike Forums > Framebuilders
Reload this Page >

Cannondale non-replaceable Derailleur Hanger Question

Framebuilders Thinking about a custom frame? Lugged vs Fillet Brazed. Different Frame materials? Newvex or Pacenti Lugs? why get a custom Road, Mountain, or Track Frame? Got a question about framebuilding? Lets discuss framebuilding at it's finest.

Cannondale non-replaceable Derailleur Hanger Question

Old 08-03-14, 03:05 PM
  #1  
Leinster
Senior Member
Thread Starter
 
Join Date: Jun 2013
Posts: 2,247
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 53 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Cannondale non-replaceable Derailleur Hanger Question

The derailleur hanger on my 80's Cannondale snapped a year ago, and I've since been riding it as a single speed. A friend has access to a TiG welder, and claims it wouldn't be a problem to weld the lost piece of hanger back onto the frame and re-thread, to accept a new derailleur (or at the very least, a tensioner).

Any reasons why this wouldn't work?

And if that would work, would it be a step too far to consider asking him to spread the dropouts from 126 to 130? I was running 8spd at the time the hanger snapped, and wouldn't want to risk having the same accident again.
Leinster is offline  
Old 08-03-14, 03:35 PM
  #2  
MassiveD
Senior Member
 
Join Date: Jul 2011
Posts: 2,434
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 31 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
It would be a bad idea to weld it. Hard not to goof such small parts, but it also needs to have the whole frame heat treated which could be awkward. You should be able to get a hanger for the deraileur.
MassiveD is offline  
Old 08-03-14, 05:23 PM
  #3  
busdriver1959
Senior Member
 
Join Date: Feb 2011
Posts: 792
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 47 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Wouldn't just the HAZ need to be treated? If it's just the rear dropout does it really need to be treated? Forgive me if the questions are stupid, I've never tig'd and don't know much about aluminum.
busdriver1959 is offline  
Old 08-03-14, 06:06 PM
  #4  
Leinster
Senior Member
Thread Starter
 
Join Date: Jun 2013
Posts: 2,247
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 53 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by MassiveD View Post
It would be a bad idea to weld it. Hard not to goof such small parts, but it also needs to have the whole frame heat treated which could be awkward. You should be able to get a hanger for the deraileur.
Haven't been able to find one so far. Like I say above, it's not a removeable hanger, it's a part of the frame.

I've looked at replacement hangers, but I'm not sure there's any way to tell for sure which one might work without ordering a bunch of them and keeping going til one fits. I've been to a couple of Dale dealers who haven't known any way of sorting it out.
Attached Images
File Type: jpg
IMG_0448.jpg (93.6 KB, 13 views)
Leinster is offline  
Old 08-03-14, 08:18 PM
  #5  
Andrew R Stewart 
Senior Member
 
Andrew R Stewart's Avatar
 
Join Date: Feb 2012
Location: Rochester, NY
Posts: 11,570

Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Raleigh Pro, Trek Cycle Cross, Mongoose tomac ATB, GT Bravado ATB, JCP Folder

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1704 Post(s)
Likes: 0
Liked 28 Times in 24 Posts
Problem Solvers Universal Der Hanger, part #FS0920 , from Quality Bicycle Parts.

I have seen welded repairs on these old Cannondales. Sometimes with good results, some times not. Andy.
Andrew R Stewart is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
shopper8707
Charity Events
1
07-30-15 09:54 AM
Jax Rhapsody
Mountain Biking
3
03-04-15 06:35 AM
bt
Road Cycling
13
12-18-14 09:26 PM
Jarrett2
Clydesdales/Athenas (200+ lb / 91+ kg)
44
12-19-13 08:48 AM
CrankAndYank
Road Cycling
42
05-29-13 02:38 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


Thread Tools
Search this Thread

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

Copyright 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.