Go Back  Bike Forums > Bike Forums > Road Cycling
Reload this Page >

Dura ace 10 derailluer compatable with 9?

Notices
Road Cycling “It is by riding a bicycle that you learn the contours of a country best, since you have to sweat up the hills and coast down them. Thus you remember them as they actually are, while in a motor car only a high hill impresses you, and you have no such accurate remembrance of country you have driven through as you gain by riding a bicycle.” -- Ernest Hemingway

Dura ace 10 derailluer compatable with 9?

Old 09-25-06, 10:54 PM
  #1  
Senior Member
Thread Starter
 
Join Date: Feb 2004
Location: NC
Posts: 238
Likes: 0
Liked 0 Times in 0 Posts
Dura ace 10 derailluer compatable with 9?

Maybe this has already been discussed but I cant find it. I hear the new 10 speed rd-7800 is compatable with 9 speed shifters. BUT, I also hear that it does not work well, especially with a 27 tooth cog. Has anyone tried the new derailluer with like a sram 12-26? New rd-7700s are next to impossible to find (yes I am aware they dont make them anymore)so I guess someone is sitting on a bunch of them waiting for the right moment on ebay. Or shimano was exceptionally thourough in recalling the remaining ones out there.
roadpig2001 is offline  
Old 09-25-06, 10:56 PM
  #2  
if x=byh then x+1=byn
 
blandin's Avatar
 
Join Date: Mar 2005
Location: Sacramento, CA
Posts: 3,442

Bikes: See signature

Likes: 0
Liked 1 Time in 1 Post
I am currently using a RD-7800 with a 12-27 CS-7700 with zero problems. Works just fine.
__________________
'00 TiSports Titanium - DA 9 speed------ '01 KHS Flite 800 - DA/Utegra 9 speed mix
‘02
Ellsworth Flight - Ultegra 10 speed -.'03 Basso Coral - Ultegra 10 speed
'03 Specialized Allez Pro - DA 10 speed .'04 Scattante CFR Limited - DA 9 speed
'05 KHS Flite 2000 - Ultegra 9 speed -... '06 Flyte SRS-3 - DA 9 speed-------
'05 Serotta Fierte - Utegra 10 speed--..-'07 Pedal Force RS - SRAM Force
blandin is offline  
Old 09-25-06, 10:57 PM
  #3  
Mad Scientist
 
chzman's Avatar
 
Join Date: Mar 2005
Location: Seven Hills, WI
Posts: 1,156

Bikes: Dean TI fixie... Viner ProComp... NEXT pink sparkely!

Likes: 0
Liked 0 Times in 0 Posts
yup. works fine. i have a 7800 RD and 9sp shifters.

*i don't run a 27t cog though, so i can't 100% sure of your situation.
chzman is offline  
Old 09-25-06, 10:57 PM
  #4  
semifreddo amartuerer
 
'nother's Avatar
 
Join Date: Oct 2004
Location: Northern CA
Posts: 4,599

Bikes: several

Likes: 0
Liked 2 Times in 2 Posts
The D/A 10s derailler will be fine, even with a 27 cog. Whoever you "heard" that from probably did not have it properly adjusted. It will also work just with SRAM (and other Shimano-compatible) cassettes.
'nother is offline  
Old 09-25-06, 11:09 PM
  #5  
Senior Member
Thread Starter
 
Join Date: Feb 2004
Location: NC
Posts: 238
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by 'nother
The D/A 10s derailler will be fine, even with a 27 cog. Whoever you "heard" that from probably did not have it properly adjusted. It will also work just with SRAM (and other Shimano-compatible) cassettes.
Actually I" heard" it on another cycling forum. I believe it had something to do with the number of pulley cog teeth. They are mostly idiots over there so I thought I would check where the knowledge base is deeper.
roadpig2001 is offline  
Old 09-25-06, 11:56 PM
  #6  
Aluminium Crusader :-)
 
Join Date: Apr 2004
Location: Melbourne, Australia
Posts: 10,048
Liked 10 Times in 7 Posts
I think it says on the rear derailleur box: "9 and 10 speed compatible"

I'm using a 10sp RD with 9sp shifters, and it works great, but I don't have a big cog

Last edited by 531Aussie; 09-26-06 at 08:49 AM.
531Aussie is offline  
Old 09-26-06, 12:02 AM
  #7  
DEADBEEF
 
khuon's Avatar
 
Join Date: Aug 2002
Location: Catching his breath alongside a road near Seattle, WA USA
Posts: 12,234

Bikes: 1999 K2 OzM, 2001 Aegis Aro Svelte

Likes: 0
Liked 6 Times in 4 Posts
Hmmm... Shimano is pretty particular about making their shifting as smooth as possible. And they do sell a 12-27 CS-7800. I can't see them releasing a rear derailleur that won't nicely shift a 27T cog when they sell a cassette for that group with a 27T cog.
__________________
1999 K2 OzM 2001 Aegis Aro Svelte
"Be liberal in what you accept, and conservative in what you send." -- Jon Postel, RFC1122
khuon is offline  
Old 09-26-06, 05:51 AM
  #8  
Senior Member
 
Join Date: Sep 2002
Location: Philadelphia suburb
Posts: 911
Likes: 0
Liked 0 Times in 0 Posts
I'm missing something here: with this kind of set-up, do you have 10 usable gears in the back or just 9, because that's all the shifter allows? If the latter, is it a prelude to ultimately upgrading to 10-speed brifters?
lrzipris is offline  
Old 09-26-06, 06:05 AM
  #9  
Senior Member
 
Join Date: Jan 2006
Location: Ft Mill, SC
Posts: 1,170

Bikes: Parlee Z4, Storck C1.1

Likes: 0
Liked 0 Times in 0 Posts
Could one in theory use 10 speed brifters, cassette, cranks, and chain with 9 speed derailleurs?
jamiewilson3 is offline  
Old 09-26-06, 06:25 AM
  #10  
Senior Member
Thread Starter
 
Join Date: Feb 2004
Location: NC
Posts: 238
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by 531Aussie
I think it says on the rear derailleur box: "9 and 10 speed compatible"

I'm using a 10sp RD with 9sp shifters, and it works grerat, but I don't have big cog
Thanks, that answers my question if shimano says its compatable then I guess there is no problem. It seems that one way or another they are going to drag us kicking and screaming to the extra gear. Progress I guess.

Last edited by roadpig2001; 09-26-06 at 07:14 AM.
roadpig2001 is offline  
Old 09-26-06, 06:38 AM
  #11  
No Talent Assclown
 
Falkon's Avatar
 
Join Date: Jan 2006
Location: Southern US :(
Posts: 1,319

Bikes: 1984 Ciocc Designer '84, Custom Columbus EL Keith Anderson -- Ultegra/DA 10sp mix, 2019 Trek Checkpoint AL All-arounder

Liked 27 Times in 23 Posts
Originally Posted by jamiewilson3
Could one in theory use 10 speed brifters, cassette, cranks, and chain with 9 speed derailleurs?
Yes and no. You can use the 9-speed derailleurs, but you need a 10-speed chain.
__________________
Fällt der Pfarrer in den Mist, lacht der Bauer bis er pisst.
Falkon is offline  
Old 09-26-06, 08:03 AM
  #12  
Mad Scientist
 
chzman's Avatar
 
Join Date: Mar 2005
Location: Seven Hills, WI
Posts: 1,156

Bikes: Dean TI fixie... Viner ProComp... NEXT pink sparkely!

Likes: 0
Liked 0 Times in 0 Posts
i dislike the word 'brifters'
chzman is offline  
Old 09-26-06, 08:30 AM
  #13  
semifreddo amartuerer
 
'nother's Avatar
 
Join Date: Oct 2004
Location: Northern CA
Posts: 4,599

Bikes: several

Likes: 0
Liked 2 Times in 2 Posts
Originally Posted by roadpig2001
I thought I would check where the knowledge base is deeper.
You made the right decision Check out the Bicycle Mechanics subforum, too.

It'll work just fine. Derailers don't really have "speeds" ... their position is controlled by the shifters. You could use almost any relatively modern derailer (8, 9, 10s) and it will work fine. The main thing is that the shifters match the # of cogs (but even so, there are some tricks for mixing 10s shifters with a 9s casssette).
'nother is offline  
Old 09-26-06, 08:51 AM
  #14  
Aluminium Crusader :-)
 
Join Date: Apr 2004
Location: Melbourne, Australia
Posts: 10,048
Liked 10 Times in 7 Posts
Originally Posted by chzman
i dislike the word 'brifters'
AAGH!! ME TOO!!

Hate it. We all know what "shifters", "STIs", and "ergo levers" are
531Aussie is offline  
Old 09-26-06, 09:49 AM
  #15  
Senior Member
 
Join Date: Jan 2006
Location: Ft Mill, SC
Posts: 1,170

Bikes: Parlee Z4, Storck C1.1

Likes: 0
Liked 0 Times in 0 Posts
Sorry to insight all of the hatred of the word brifters, I will try to accomodate.

Thanks for the sheldon brown link about brifters. That is what I thought about the brifters. I just wondered if there was a cam in the brifter/RD combo that would cause each click to be off when doing a hybrid 9/10 speed brifter/RD combo. After reading and doing some of my own research, it is true that the brifters, cassette, and chain are the only things that need to be changed for a 9 to 10 conversion. The 7700 cranks do actually work with either.
jamiewilson3 is offline  

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread

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

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