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


Go Back   > >

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.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 04-23-11, 08:52 AM   #1
Gyro_T
Senior Member
Thread Starter
 
Gyro_T's Avatar
 
Join Date: Apr 2011
Location: Oregon
Bikes: 1974 Jack Davis, Zeus Competition, Bridgestone MB2, Motebecane Grand Comp commuter, Salsa Fargo Ti
Posts: 190
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
braze-on position for ft. derailleur.

I bought a NOS ft Zeus derailleur for an old Zeus frame and want to do the best job I can at brazing on correctly. Any guidlines for that? I seem to remember for old derailleurs the outside of the cage needed to just clear the large ring, say about a millimeter as it passed over the teeth. Your input is appreciated,

Thanks,
Gyro_T is offline   Reply With Quote
Old 04-23-11, 01:04 PM   #2
JohnDThompson 
Old fart
 
JohnDThompson's Avatar
 
Join Date: Nov 2004
Location: Appleton WI
Bikes: Several, mostly not name brands.
Posts: 16,360
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 58 Post(s)
Any reason not to use a clamp-on derailleur? Braze-on FDs can be limiting when changing chainring sizes.
JohnDThompson is offline   Reply With Quote
Old 04-23-11, 03:14 PM   #3
unterhausen
Randomhead
 
Join Date: Aug 2008
Location: Happy Valley, Pennsylvania
Bikes:
Posts: 14,529
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
trying to decide where to put the boss is a pain, even when the data is published. It really depends on what chainring sizes you think you will use.
unterhausen is offline   Reply With Quote
Old 04-23-11, 03:27 PM   #4
Alan Edwards
Senior Member
 
Alan Edwards's Avatar
 
Join Date: Apr 2011
Location: Lancaster,CA the desert north of Los Angeles
Bikes: 84' Ciocc, 79' Shogun 1000, 76' KHS Gran Sport, 96' Schwinn Super Sport,
Posts: 702
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
If you set the slot to hold the FD for a 53-42 you should be able to later switch to a compact 50-34 and have the FD work.
Alan Edwards is offline   Reply With Quote
Old 04-23-11, 11:03 PM   #5
Gyro_T
Senior Member
Thread Starter
 
Gyro_T's Avatar
 
Join Date: Apr 2011
Location: Oregon
Bikes: 1974 Jack Davis, Zeus Competition, Bridgestone MB2, Motebecane Grand Comp commuter, Salsa Fargo Ti
Posts: 190
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Thanks for the responses. To answer John's question, I could not find a Zeus clamp-on derailleur at a reasonable price within a reasonable time spent on @#$% eBay. Plus, I was looking for an excuse to practice brazing something on this old Zeus frame from the 70's. This bike will have a 53 tooth large ring as long as I have it, so I won't have to worry about that. I will just go by the old school method and clamp it on with a hose clamp and flow that brass into the space and hope for the best. Again, I thank you all for your responses.
Gyro_T is offline   Reply With Quote
Old 04-25-11, 04:35 PM   #6
JohnDThompson 
Old fart
 
JohnDThompson's Avatar
 
Join Date: Nov 2004
Location: Appleton WI
Bikes: Several, mostly not name brands.
Posts: 16,360
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 58 Post(s)
The Shimano investment-cast FD braze-on has a small pin that holds it in position while you braze. Plus, it looks a lot cooler than the simple stamped braze-ons from Campy, etc.

Last edited by JohnDThompson; 04-25-11 at 04:45 PM.
JohnDThompson 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 04:41 AM.