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 01-18-08, 09:13 AM   #1
aquateen
Senior Member
Thread Starter
 
Join Date: Oct 2007
Location: Washington, DC
Bikes: CAAD10 5, Trek 1000 Alpha Series
Posts: 633
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Paranoid Bike Compatibility Question

ok so im building a bike and just realized that my rear deraileur (8sp) was not compatible with the rest of my set up (9sp) so i'm a bit paranoid with the rest of my setup. i just bought the new tiagra 9sp shifters and i have a compact double crankset. does it matter that the left hand shifter is a triple?
aquateen is offline   Reply With Quote
Old 01-18-08, 09:59 AM   #2
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: 29,117
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 179 Post(s)
First, assuming its a Shimano 8-speed rear derailleur and NOT Dura Ace, it will work fine with your 9-speed shifters, cassette and chain. I'm currently using a 105 8-speed rear derailleur on an otherwise all 9-speed 105/Ultegra bike and it shifts perfectly.

Second, Tiagra 9-speed (like both 105 and Ultegra 9-speed) brifters are both double and triple compatible.
HillRider is offline   Reply With Quote
Old 01-18-08, 11:45 AM   #3
Sheldon Brown
Gone, but not forgotten
 
Sheldon Brown's Avatar
 
Join Date: Jul 2002
Location: Newtonville, Massachusetts
Bikes: See: http://sheldonbrown.org/bicycles
Posts: 2,301
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Quote:
Originally Posted by aquateen View Post
ok so im building a bike and just realized that my rear deraileur (8sp) was not compatible with the rest of my set up (9sp) so i'm a bit paranoid with the rest of my setup. i just bought the new tiagra 9sp shifters and i have a compact double crankset. does it matter that the left hand shifter is a triple?
This is an imaginary problem.

There's no such thing as an "8-speed" derailer except in the imagination of the marketeers.

See: http://sheldonbrown.com/speeds for more general info on interchangeabilitude.

Sheldon "Not To Worry" Brown
Code:
+-----------------------------------------------------+
|  If one lets fear or hate or anger take possession  |
|  of the mind, they become self-forged chains.       |
|                            --Helen Gahagan Douglas  |
+-----------------------------------------------------+
Sheldon Brown is offline   Reply With Quote
Old 01-18-08, 12:58 PM   #4
Dan Burkhart 
Senior member
 
Dan Burkhart's Avatar
 
Join Date: Oct 2004
Location: Oakville Ontario
Bikes:
Posts: 6,059
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 59 Post(s)
Quote:
Originally Posted by Sheldon Brown View Post
This is an imaginary problem.

There's no such thing as an "8-speed" derailer except in the imagination of the marketeers.

See: http://sheldonbrown.com/speeds for more general info on interchangeabilitude.

Sheldon "Not To Worry" Brown
Code:
+-----------------------------------------------------+
|  If one lets fear or hate or anger take possession  |
|  of the mind, they become self-forged chains.       |
|                            --Helen Gahagan Douglas  |
+-----------------------------------------------------+
Sheldon invents yet another word. "Interchangeabilitude" I like it. Webster just can't keep up.
__________________
Gearhubs demystified and other cool stuff.


WANTED: Dead or broken gearhubs for failure analysis.

Like the shop
Dan Burkhart is offline   Reply With Quote
Old 01-18-08, 07:26 PM   #5
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)
Quote:
Originally Posted by Dan Burkhart View Post
Sheldon invents yet another word. "Interchangeabilitude" I like it. Webster just can't keep up.
Give Webster a few years, it'll be in there... or better yet, there should be "specialty" dictionaries such as a cycling one.
z415 is offline   Reply With Quote
Old 01-18-08, 08:36 PM   #6
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: 29,117
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 179 Post(s)
Quote:
Originally Posted by Sheldon Brown View Post
This is an imaginary problem.

There's no such thing as an "8-speed" derailer except in the imagination of the marketeers.

Sheldon "Not To Worry" Brown
Since my 105 rear derailleur was bought when 105 was strictly an 8-speed goup, it is de facto an "8-speed rear derailleur". Nevermind that it will index just fine with 7,8,9 and 10-speed components, it's still an 8-speed derailleur. So there!
HillRider is offline   Reply With Quote
Old 01-18-08, 09:47 PM   #7
joejack951
Senior Member
 
joejack951's Avatar
 
Join Date: May 2004
Location: Wilmington, DE
Bikes: 1984 Trek 660, 2003 Specialized Hardrock, 2004 LOOK KG386i (RIP), 2005 Iron Horse Warrior Expert, 2009 Pedal Force CX1, 2014 Islabikes CNOC 14 (son's)
Posts: 10,375
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 296 Post(s)
Quote:
Originally Posted by Sheldon Brown View Post
There's no such thing as an "8-speed" derailer except in the imagination of the marketeers.
Well, the finish will match the finish of other components from that group, most of which are #-of-speeds specific. But that's where the compatibility issues end. Same thing applies to cranksets (at least modern ones) as far as I know. My wife's road bike, which I converted to an 8 speed, is still using the original crank from when it was a 6 speed.
joejack951 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 03:01 AM.