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


Go Back   > >

Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 12-25-08, 12:03 PM   #1
Daytrip
Medicinal Cyclist
Thread Starter
 
Daytrip's Avatar
 
Join Date: Aug 2008
Location: Mohawk Valley/Adks, NYS
Bikes: 2003 Klein Q Carbon Race; 2009 Giant OCR-1
Posts: 2,807
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Brazed FD adapter?

Can a brazed FD be adapted to fit to frame not designed to accommodate a brazed derailer? If so, is it just a clamp-on adapter?
Daytrip is offline   Reply With Quote
Old 12-25-08, 12:08 PM   #2
dvs cycles
Senior Member
 
Join Date: Oct 2007
Location: SoCal
Bikes:
Posts: 1,164
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
http://www.excelsports.com/new.asp?p...jor=1&minor=33

http://www.excelsports.com/new.asp?p...jor=1&minor=33

http://www.excelsports.com/new.asp?p...jor=1&minor=33

Last edited by dvs cycles; 12-25-08 at 12:11 PM.
dvs cycles is offline   Reply With Quote
Old 12-25-08, 01:41 PM   #3
J.P.
Retrogrouch
 
Join Date: Feb 2005
Bikes:
Posts: 81
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Shimano makes a clamp-on adapter that allows their brazed FD to be mounted on a frame not designed to accommodate a brazed derailer. I don't know about other brands of FD.
J.P. is offline   Reply With Quote
Old 12-25-08, 02:22 PM   #4
Daytrip
Medicinal Cyclist
Thread Starter
 
Daytrip's Avatar
 
Join Date: Aug 2008
Location: Mohawk Valley/Adks, NYS
Bikes: 2003 Klein Q Carbon Race; 2009 Giant OCR-1
Posts: 2,807
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks. I'm going to be putting a Shimano 105 brazed FD on a Trek 1.2 frame. Does anybody know offhand what size tube that is?
Daytrip is offline   Reply With Quote
Old 12-25-08, 02:42 PM   #5
Retro Grouch 
Senior Member
 
Retro Grouch's Avatar
 
Join Date: Feb 2004
Location: St Peters, Missouri
Bikes: Rans Rockst (Retro rocket) Rans Enduro Sport (Retro racket) Catrike 559, Merin Bear Valley (beater bike).
Posts: 26,736
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 140 Post(s)
Quote:
Originally Posted by Daytrip View Post
Thanks. I'm going to be putting a Shimano 105 brazed FD on a Trek 1.2 frame. Does anybody know offhand what size tube that is?
One measurement is worth 1,000 guesses.

Wrap a piece of paper around the seat tube. Mark where it overlaps. Measure that distance in millimeters. Divide by 3.14. That's your answer.
Retro Grouch is offline   Reply With Quote
Old 12-25-08, 03:50 PM   #6
oldride
Senior Member
 
oldride's Avatar
 
Join Date: Apr 2008
Location: Rochester, MN
Bikes: 91 Specialized Sirrus, 96 Gary Fischer, 08 Specialized Roubaix Elite, 2010 Specialized Tricross Sport
Posts: 362
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Daytrip View Post
Thanks. I'm going to be putting a Shimano 105 brazed FD on a Trek 1.2 frame. Does anybody know offhand what size tube that is?
You could use an adjustable wrench (crescent) and open it to slide over the tube then tighten until it touches. Remove and measure the distance of the opening.

Here is a 9sp 105 FD brazed on, clamp on, double or triple, cheap!
http://store.icyclesusa.com/shared/S...&ProductID=103
oldride is offline   Reply With Quote
Old 12-25-08, 04:09 PM   #7
HillRider 
Senior Member
 
Join Date: Aug 2005
Location: Pittsburgh, PA
Bikes: '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
Posts: 28,917
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 94 Post(s)
Quote:
Originally Posted by J.P. View Post
Shimano makes a clamp-on adapter that allows their brazed FD to be mounted on a frame not designed to accommodate a brazed derailer. I don't know about other brands of FD.
Campy does too.
HillRider is offline   Reply With Quote
Old 12-25-08, 07:27 PM   #8
ginsoakedboy
Banned
 
Join Date: Dec 2004
Bikes:
Posts: 616
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Here's one for 28.6 that Velo Orange sells:

http://www.velo-orange.com/decl28.html
ginsoakedboy is offline   Reply With Quote
Old 12-25-08, 11:08 PM   #9
Deanster04
Senior Member
 
Deanster04's Avatar
 
Join Date: Dec 2005
Location: Boulder, Colorado
Bikes: Cinelli Supercoursa 69, Ritchey Breakaway Cross, Mondonico Diamond Extra 05, Coors Light Greg Lemond (built by Scapin) 88, Scapin MTB, Stumpjumper 83, Specialized Stumpjumper M4, Lemond Poprad 2001
Posts: 1,366
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Take it to your local good LBS and have them Mic the tube or pull out the seat post until you can read the diameter of the seat post. Most are scribed. I have been using the adaptors for years since I buy and sell frames over the years that have different ST diameters. Adaptors are much cheaper than the derailluers. Good luck.
Deanster04 is offline   Reply With Quote
Old 12-26-08, 09:14 AM   #10
HillRider 
Senior Member
 
Join Date: Aug 2005
Location: Pittsburgh, PA
Bikes: '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
Posts: 28,917
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 94 Post(s)
For the vast majority of bikes, the seat tube OD is one of three sizes: 1-1/8" (28.6 mm), 1-1/4" (31.8 mm) or 1-3/8" (34.9 aka 35 mm). Even eyeballing a ruler should tell you which you have.

If there was an old clamp-on fd, look inside the clamp as the diameter is usually engraved there.
HillRider 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 09:11 PM.