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 12-21-08, 05:27 AM   #1
otakux
Senior Member
Thread Starter
 
Join Date: Jul 2008
Bikes:
Posts: 107
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Cable housing?

I was wondering if derailleur and brake housings are the same
otakux is offline   Reply With Quote
Old 12-21-08, 05:49 AM   #2
Steev
Senior Member
 
Steev's Avatar
 
Join Date: Jul 2005
Location: Backwoods of Ontario
Bikes:
Posts: 2,150
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
No. Brake housing is spiral wound to take the loading braking places on it but it does compress slightly. Index shifting is degraded by this, so non-compressable housing made of strands that run parallel to the cable axis is used. This cable cannot take heavy loading, it is liable to split under load, so is unsuitable for brake housing.
If you use friction shifting then spiral wound housing can be used for the shift housing.
Steev is online now   Reply With Quote
Old 12-21-08, 05:56 AM   #3
z415
Senior Member
 
z415's Avatar
 
Join Date: Apr 2006
Location: Gainesville/Tampa, FL
Bikes: Trek 1000, two mtbs and working on a fixie for commuting.
Posts: 2,343
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
To build on ^, compression less housing should be used for shifters as to not move the RD/FD positions whenever you turn your bar, etc.

Also, am I mistaken or are the IDs of the two types of housing different?
z415 is offline   Reply With Quote
Old 12-21-08, 06:14 AM   #4
Retro Grouch 
Senior Member
 
Retro Grouch's Avatar
 
Join Date: Feb 2004
Location: St Peters, Missouri
Bikes: Catrike 559 I own some others but they don't get ridden very much.
Posts: 26,904
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 206 Post(s)
That's a question that has a moving answer.

Way back when they used to be the same.

When index shifting systems came along shifters required compressionless housing with the reinforcing wires running parallel, or nearly parallel to the inner cable. Brake housing used more spiral wound reinforcing wires to keep the greater cable tension from breaking out. During this era many shift housings were only 4mm in diameter but that's not a reliable indication because 5mm shift housing was also available.

Today cable activated disc brakes have ushered in the era of compressionless brake/shifter housing. In other words, if you get the right stuff, you can use the same cable housing for both brakes and shifters again.
Retro Grouch 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 07:11 AM.