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

Go Back   > >

Mountain Biking Mountain biking is one of the fastest growing sports in the world. Check out this forum to discuss the latest tips, tricks, gear and equipment in the world of mountain biking.

User Tag List

Thread Tools Search this Thread
Old 05-01-12, 06:54 PM   #1
Senior Member
Thread Starter
mihlbach's Avatar
Join Date: Dec 2005
Location: Long Island, NY
Posts: 6,441
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 25 Post(s)
long or short cage deraileur? How to tell.

I just bought a used 9 speed Shimano XT derailleur on ebay for a 2x9er that I am building. The seller advertised the derailleur as a medium cage (which is what I wanted), but having received it, it looks like a long cage to me. I can't find any information about cage lengths for short, medium, and long cage derailleurs. There is nothing stamped on the derailleur that gives any indication either.
The derailleur in question has RD-M752 stamped on it, but has nothing indicating the cage length. The cage itself measures 100mm c-c. Is there any way to tell?

I realize that the derailleur will work regardless, but, just for reference, would still like to know what I have.
mihlbach is online now   Reply With Quote
Old 05-01-12, 10:11 PM   #2
Low car diet
JiveTurkey's Avatar
Join Date: Aug 2007
Location: Corvallis, OR, USA
Bikes: 2006 Windsor Dover w/105, 2007 GT Avalanche w/XT, 1995 Trek 820 setup for touring, 201? Yeah single-speed folder, 199? Huffy tandem.
Posts: 2,407
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
100mm is the length of my long-cage XT RD.

Depending on ranges of your cassette and chainrings, you may need a long-cage.
JiveTurkey is offline   Reply With Quote
Old 05-02-12, 02:04 PM   #3
use your best eye
kenhill3's Avatar
Join Date: Mar 2006
Location: Olympia, Washington
Bikes: '75 Bertin, '93 Parkpre Team 925, '04 Kona King Kikapu, '05 Bianchi Vigorelli
Posts: 3,058
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Can't find info?

Some info from SHELDON BROWN and friends:
"I tell you, We are here on earth to fart around, and don't let anybody tell you any different." - Kurt Vonnegut jr.
kenhill3 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 10:39 AM.

  • Ask a Question
    get answers from real people!
Click to start entering your question.