Go Back  Bike Forums > Bike Forums > Mountain Biking
Reload this Page >

Long Cage Or Medium Cage........

Notices
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.

Long Cage Or Medium Cage........

Old 05-03-10, 06:05 PM
  #1  
Senior Member
Thread Starter
 
Join Date: Apr 2008
Posts: 76
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Long Cage Or Medium Cage........

I decided to build a DS bike. The gearing is 24 speed with 11/34 free wheel on back.
Would you go with long or med. cage rear derailuer? Is there less chain slap with med. cage?
Thanks to all that respond........
bikingsoul is offline  
Old 05-03-10, 06:08 PM
  #2  
I suck, but you're worse
 
Join Date: Jun 2005
Location: LA
Posts: 672

Bikes: Motobecane Fantom Uno-Got rid of the rest when I moved to LA:(

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Of course there is a less chain slap/play with the shorter cage, but probably not enough to matter much. That said go with the short cage if it fits your gearing and you KNOW you will be happy with it. If you think you may want to increase your granny cog later then go with the long cage.
sooprvylyn is offline  
Old 05-03-10, 07:16 PM
  #3  
mechanically sound
 
frankenmike's Avatar
 
Join Date: Jan 2007
Location: Dover, NH
Posts: 1,606

Bikes: Indy Fab steel deluxe, Aventon cordoba, S-works stumpy fsr, Masi vincere, Dahon mu uno, Outcast 29 commuter

Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 100 Post(s)
Liked 84 Times in 53 Posts
All things being equal, the long cage will wrap more chain, and therefore have less slap. More importantly, however, is the calculated wrap capacity requirement of your drivetrain, and the capacities of the two derailers. For your drive train, (34-11) + (44-22) =45. If both derailers can wrap 45 teeth worth of chain(listed on the derailer specs) I would choose the smaller(and therefore lighter) cage.
frankenmike is offline  
Old 05-04-10, 06:44 AM
  #4  
one less horse
 
cryptid01's Avatar
 
Join Date: Aug 2003
Location: The Hinterlands
Posts: 5,601
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked 2 Times in 2 Posts
Originally Posted by bikingsoul
I decided to build a DS bike. The gearing is 24 speed with with 11/34
What does DS stand for?
cryptid01 is offline  
Old 05-04-10, 07:12 AM
  #5  
Moar cowbell
 
dminor's Avatar
 
Join Date: Oct 2004
Location: The 509
Posts: 12,481

Bikes: Bike list is not a resume. Nobody cares.

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 29 Post(s)
Likes: 0
Liked 6 Times in 5 Posts
Originally Posted by cryptid01
What does DS stand for?
Oh . . . no . . . it's too cheap . . . must . . . resist....

Dual Slalom? Damn Slow? Dual Sport? Dirt Slinger? Definitely Sucks?
__________________
Originally Posted by Mark Twain
"Don't argue with stupid people; they will drag you down to their level and then beat you with experience."
dminor is offline  
Old 05-05-10, 08:40 AM
  #6  
Senior Member
Thread Starter
 
Join Date: Apr 2008
Posts: 76
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Uh, That would be Dual Suspension.......
bikingsoul is offline  
Old 05-05-10, 09:52 AM
  #7  
Moar cowbell
 
dminor's Avatar
 
Join Date: Oct 2004
Location: The 509
Posts: 12,481

Bikes: Bike list is not a resume. Nobody cares.

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 29 Post(s)
Likes: 0
Liked 6 Times in 5 Posts
Ahhhhh . . . forgot about that. Used to seeing it as FS.

In answer to you question (well, my opinion really) . . . I would go medium cage. Less banging around and a little less vulnerable.
__________________
Originally Posted by Mark Twain
"Don't argue with stupid people; they will drag you down to their level and then beat you with experience."
dminor is offline  
Old 05-05-10, 11:54 AM
  #8  
runnin' down a dream
 
edbikebabe's Avatar
 
Join Date: Jul 2006
Location: Somewhere out there
Posts: 2,767

Bikes: Turner Flux, Orbea Onix Dama.

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
I'd go for medium cage too.
edbikebabe is offline  
Old 05-05-10, 12:32 PM
  #9  
Wood Licker
 
Maelstrom's Avatar
 
Join Date: Apr 2002
Location: Whistler,BC
Posts: 16,966

Bikes: Trek Fuel EX 8 27.5 +, 2002 Transition Dirtbag, Kona Roast 2002

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 23 Post(s)
Likes: 0
Liked 2 Times in 2 Posts
Originally Posted by dminor
Ahhhhh . . . forgot about that. Used to seeing it as FS.

In answer to you question (well, my opinion really) . . . I would go medium cage. Less banging around and a little less vulnerable.
Ditto
Maelstrom is offline  
Old 05-05-10, 12:32 PM
  #10  
Wood Licker
 
Maelstrom's Avatar
 
Join Date: Apr 2002
Location: Whistler,BC
Posts: 16,966

Bikes: Trek Fuel EX 8 27.5 +, 2002 Transition Dirtbag, Kona Roast 2002

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 23 Post(s)
Likes: 0
Liked 2 Times in 2 Posts
Originally Posted by dminor
Ahhhhh . . . forgot about that. Used to seeing it as FS.

In answer to you question (well, my opinion really) . . . I would go medium cage. Less banging around and a little less vulnerable.
Ditto
Maelstrom is offline  
Old 05-05-10, 12:43 PM
  #11  
Moar cowbell
 
dminor's Avatar
 
Join Date: Oct 2004
Location: The 509
Posts: 12,481

Bikes: Bike list is not a resume. Nobody cares.

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 29 Post(s)
Likes: 0
Liked 6 Times in 5 Posts
^^ Hey, you are still alive.
__________________
Originally Posted by Mark Twain
"Don't argue with stupid people; they will drag you down to their level and then beat you with experience."
dminor is offline  
Old 05-05-10, 12:56 PM
  #12  
Wood Licker
 
Maelstrom's Avatar
 
Join Date: Apr 2002
Location: Whistler,BC
Posts: 16,966

Bikes: Trek Fuel EX 8 27.5 +, 2002 Transition Dirtbag, Kona Roast 2002

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 23 Post(s)
Likes: 0
Liked 2 Times in 2 Posts
I am yes...I hang out in foo quite a bit ...
Maelstrom is offline  
Old 05-05-10, 02:42 PM
  #13  
one less horse
 
cryptid01's Avatar
 
Join Date: Aug 2003
Location: The Hinterlands
Posts: 5,601
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked 2 Times in 2 Posts
Originally Posted by bikingsoul
Uh, That would be Dual Suspension.......
Uh, well that's good because a Dual Slalom bike with that drivetrain would be ridiculous

Originally Posted by dminor
Ahhhhh . . . forgot about that. Used to seeing it as FS.
Front Suspension?

Originally Posted by Maelstrom
Ditto
Hey dude.
cryptid01 is offline  
Old 05-05-10, 03:03 PM
  #14  
Wood Licker
 
Maelstrom's Avatar
 
Join Date: Apr 2002
Location: Whistler,BC
Posts: 16,966

Bikes: Trek Fuel EX 8 27.5 +, 2002 Transition Dirtbag, Kona Roast 2002

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 23 Post(s)
Likes: 0
Liked 2 Times in 2 Posts
hey......I don't recognize the handle, but that doesn't mean much...hahaha
Maelstrom is offline  
Old 05-05-10, 03:41 PM
  #15  
Moar cowbell
 
dminor's Avatar
 
Join Date: Oct 2004
Location: The 509
Posts: 12,481

Bikes: Bike list is not a resume. Nobody cares.

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 29 Post(s)
Likes: 0
Liked 6 Times in 5 Posts
^^ We changed it because the old one had become synonymous with 'weaksauce' and 'pushover.' He needed something that sounded more 'abominable.'
__________________
Originally Posted by Mark Twain
"Don't argue with stupid people; they will drag you down to their level and then beat you with experience."
dminor is offline  
Old 05-05-10, 04:03 PM
  #16  
Senior Member
Thread Starter
 
Join Date: Apr 2008
Posts: 76
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Thanks for all the responses. Looks like I will go medium cage. Thanks........
bikingsoul is offline  
Old 05-05-10, 08:31 PM
  #17  
Senior Member
 
well biked's Avatar
 
Join Date: Jul 2005
Posts: 7,491
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 143 Post(s)
Liked 163 Times in 89 Posts
Originally Posted by bikingsoul
Thanks for all the responses. Looks like I will go medium cage. Thanks........
Since you say you have a "24 speed" I take that to mean you have a triple crank with an eight speed cassette. You need a long cage derailleur, a medium cage doesn't have enough chain wrap capacity for a triple with a mtb cassette. Medium cage mtb derailleurs are intended for mtb drivetrains with only two chainrings. The long cage models are for triples.
well biked is offline  
Old 05-05-10, 09:09 PM
  #18  
Canadian eh?
 
Join Date: May 2002
Location: Toronto
Posts: 2,135

Bikes: 2020 Specialized Roubaix Expert

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 131 Post(s)
Liked 96 Times in 54 Posts
^Agreed! Long cage for triple chainring up front!
WorldIRC is offline  
Old 05-06-10, 12:58 AM
  #19  
Moar cowbell
 
dminor's Avatar
 
Join Date: Oct 2004
Location: The 509
Posts: 12,481

Bikes: Bike list is not a resume. Nobody cares.

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 29 Post(s)
Likes: 0
Liked 6 Times in 5 Posts
I semi-disagree. As long as you don't seriously cross-chain (and really, how many people use the big ring on an MTB unless they're in an almost-spun-out situation anyway?), you should do fine with a medium cage.

Example: a medium cage derailleur with a capacity of 38. Front difference of a 44-32-22 is 22; rear difference of a 12-32 (typical 8-speed) is 20. Sum is 42 - - not far enough off 38 (IMO) to where you can't easily fudge it if you don't do silly things.
__________________
Originally Posted by Mark Twain
"Don't argue with stupid people; they will drag you down to their level and then beat you with experience."
dminor is offline  
Old 05-06-10, 07:25 AM
  #20  
Senior Member
 
well biked's Avatar
 
Join Date: Jul 2005
Posts: 7,491
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 143 Post(s)
Liked 163 Times in 89 Posts
Originally Posted by dminor
I semi-disagree. As long as you don't seriously cross-chain (and really, how many people use the big ring on an MTB unless they're in an almost-spun-out situation anyway?), you should do fine with a medium cage.

Example: a medium cage derailleur with a capacity of 38. Front difference of a 44-32-22 is 22; rear difference of a 12-32 (typical 8-speed) is 20. Sum is 42 - - not far enough off 38 (IMO) to where you can't easily fudge it if you don't do silly things.
I disagree with your semi-disagreement. Number one rule of chain sizing is make sure the chain is long enough to safely shift to the largest cog/largest chainring. With that in mind, with a triple crank and medium cage derailleur, when in the smallest chainring there will be a few gear combinations (the smallest few cogs on the cassette) where the chain is too slack to function correctly. Should you severely cross chain? No, of course not; not in the big ring, not in the small ring. Do people do these "silly things?" Based on my experience working in my bike shop: yes, very often. The simple, straightforward answer to the OP's question is to get a long cage derailleur. His type of drivetrain is what they are designed for. A medium cage is not.

Last edited by well biked; 05-06-10 at 07:28 AM.
well biked is offline  
Old 05-06-10, 08:09 AM
  #21  
mechanically sound
 
frankenmike's Avatar
 
Join Date: Jan 2007
Location: Dover, NH
Posts: 1,606

Bikes: Indy Fab steel deluxe, Aventon cordoba, S-works stumpy fsr, Masi vincere, Dahon mu uno, Outcast 29 commuter

Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 100 Post(s)
Liked 84 Times in 53 Posts
I just checked- Shimano medium cage has a 33T capacity, Sram medium cage has a 37T capacity. OP- DO NOT GET A MEDIUM CAGE! You need a long cage derailer.
frankenmike is offline  
Old 05-06-10, 08:11 AM
  #22  
Pokemon Master
 
Darth_Firebolt's Avatar
 
Join Date: Dec 2008
Location: Arkansas
Posts: 1,108

Bikes: All City Cosmic Stallion, Salsa Colossal, Surly Preamble, 1985 Schwinn High Sierra x3

Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 122 Post(s)
Liked 6 Times in 5 Posts
Originally Posted by well biked
I disagree with your semi-disagreement. Number one rule of chain sizing is make sure the chain is long enough to safely shift to the largest cog/largest chainring. With that in mind, with a triple crank and medium cage derailleur, when in the smallest chainring there will be a few gear combinations (the smallest few cogs on the cassette) where the chain is too slack to function correctly. Should you severely cross chain? No, of course not; not in the big ring, not in the small ring. Do people do these "silly things?" Based on my experience working in my bike shop: yes, very often. The simple, straightforward answer to the OP's question is to get a long cage derailleur. His type of drivetrain is what they are designed for. A medium cage is not.
i disagree with your disagreement of dminor's semi-disagreement.
he is here asking the question (and building up his own bike from the sound of it), so he is obviously not one of those morans* that runs big cog + big ring. he has been warned that he won't be able to run that gear, so i think he can run the medium cage if he wants to. he's a big boy. if the "no big-big for less chain slap" compromise is one he is willing to make, let him. it seems like less chain slap is what he is after, so he is probably willing to give up that moranic gear combination to get it.
the real question is: what if he wants to go to a 34t rear cassette? then he would have to change to a long cage. that by itself would make me go with a long cage.
Darth_Firebolt is offline  
Old 05-06-10, 08:43 AM
  #23  
Senior Member
 
well biked's Avatar
 
Join Date: Jul 2005
Posts: 7,491
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 143 Post(s)
Liked 163 Times in 89 Posts
Originally Posted by Darth_Firebolt
i disagree with your disagreement of dminor's semi-disagreement.
he is here asking the question (and building up his own bike from the sound of it), so he is obviously not one of those morans* that runs big cog + big ring. he has been warned that he won't be able to run that gear, so i think he can run the medium cage if he wants to. he's a big boy. if the "no big-big for less chain slap" compromise is one he is willing to make, let him. it seems like less chain slap is what he is after, so he is probably willing to give up that moranic gear combination to get it.
the real question is: what if he wants to go to a 34t rear cassette? then he would have to change to a long cage. that by itself would make me go with a long cage.
First, a long and medium cage mtb derailleur both have the same largest cog compatibility. The only difference is cage length, which affects chain wrap capacity, not largest cog compatibility.

Second, it's irresponsible to advise someone to use a chain that's too short to safely shift to the largest cog/largest chainring combination. It is indeed moronic to run a chain that's too short to do this. One brain lapse and you'll likely snap your deraiiler, your hanger, your chain, maybe damage your rear wheel, and maybe even your frame. Risking this for what reason? The difference between using a medium and long cage deraiileur?

Bottom line: if you have a mountain bike with a triple crank, use a long cage deraiileur. That's why they make them. And make damned sure your chain is long enough to safely cover the largest cog/largest chainring, no matter what.

Last edited by well biked; 05-06-10 at 09:16 AM.
well biked is offline  
Old 05-06-10, 12:51 PM
  #24  
Senior Member
Thread Starter
 
Join Date: Apr 2008
Posts: 76
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
I thought this thread was over after the first few answers. So I ordered a medium cage. What is a medium cage used for if not for a mountain bike with 3 chain rings. If I get a smaller free hub will the medium cage work? Lessons learned I guess......
bikingsoul is offline  
Old 05-06-10, 02:14 PM
  #25  
Moar cowbell
 
dminor's Avatar
 
Join Date: Oct 2004
Location: The 509
Posts: 12,481

Bikes: Bike list is not a resume. Nobody cares.

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 29 Post(s)
Likes: 0
Liked 6 Times in 5 Posts
^^ Always take everything on interwebs forums with the caveat that what we say is usually JUST ONE PERSON'S OPINION. And those opinions often differ. I qualify what I say quite often but sometimes I don't; but, really, that should be a given.

You really don't need to do anything drastic (IN MY OPINION). I personally would lose the big ring, put a nice bash guard on and maybe go up to a 36 middle ring anyway. Since you're building this, take the opportunity to customize some of your build to better suit the way you're going to ride it.

More info on chain wrap on the late Sheldon Brown's web site which you may find some comfort in:

https://www.sheldonbrown.com/harris/derailers-rear.html

See his note about capacity.
__________________
Originally Posted by Mark Twain
"Don't argue with stupid people; they will drag you down to their level and then beat you with experience."
dminor is offline  

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service -

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.