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

Thread Tools Search this Thread
Old 06-27-10, 04:47 AM   #1
Senior Member
Thread Starter
JonathanGennick's Avatar
Join Date: Apr 2007
Location: Munising, Michigan, USA
Bikes: Priority Bicycles Continuum, Priority Bicycles Eight
Posts: 3,046
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 190 Post(s)
Hanger alignment when there's no hanger

Fairly regularly now I find myself working on low-end bikes having no derailleur hanger as part of the frame. The hanger ends up being part of the derailleur. And thus the Park Tools hanger alignment gauge is cannot be used.

How does one align such a built-in hanger?
JonathanGennick is offline   Reply With Quote
Old 06-27-10, 05:38 AM   #2
Senior Member
Join Date: Sep 2004
Location: boston, ma
Posts: 2,869
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
use the calibrated eye and an old school park bt 3
reptilezs is offline   Reply With Quote
Old 06-27-10, 06:21 AM   #3
Join Date: Apr 2007
Location: Syracuse, NY
Bikes: 2008 Novara Randonee - love it. Would have more bikes if I had time to ride them all. Previous bikes: 1968 Motobecane Mirage, 1972 Moto Grand Jubilee (my fav), Jackson Rake 16, 1983 C'dale ST500.
Posts: 6,867
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 242 Post(s)
Try by eye, replace the hanger or derailleur if that does not work.
cny-bikeman is online now   Reply With Quote
Old 06-27-10, 12:14 PM   #4
Senior Member
BCRider's Avatar
Join Date: Mar 2008
Location: The 'Wack, BC, Canada
Bikes: Norco (2), Miyata, Canondale, Soma, Redline
Posts: 5,456
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
The Mark 1 eyeball can be pretty good but it needs a reference to aid in lining up the cage and pulleys. But to do this well you want a flat plate like reference off the true axle axis to use as a reference that you can lay a ruler or other sight line spacer onto to judge the alignment of the derrailleur with more accurately. Something along the lines of an old hub with the cassette turned around backwards and use the face of the larger diameter cog as a visual reference plane. For this to work you may need to bust up the cassette and re-arrange some of the spacers and sprockets. But with a bit of effort you should then be able to lay a small straight edge along that sprocket face and extend the straight edge down to the derrailleur cage and sight things up from a number of angles. It's not perfect but I find that just sighting it using the wheel and derrailleur with no aids seems to be just too prone to picking the wrong sight line cues unless a trick of this sort is included.
BCRider is offline   Reply With Quote

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 06:54 AM.

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to and affiliated sites.
  • Ask a Question
    get answers from real people!
Click to start entering your question.