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

Reply
 
Thread Tools Search this Thread
Old 08-20-07, 07:39 AM   #1
snhrider
NE Roadie
Thread Starter
 
Join Date: Aug 2006
Location: Live Free and Ride
Bikes: 2006 Colnago C50, 2003 DeRosa Merak, 2001 Litespeed Vortex, 2001 Lemond Buenos Aires
Posts: 178
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Can I use an XT/XTR RD with a road bike ?

I posted the same question on different forum but I'd like to get your opinions.
I want to install a 34T cassette and a mountain bike RD (probably an XT or XTR) on my road bike with 10 speed DuraAce group. Can I do that and are there any gotchas in doing so. Thanks.
snhrider is offline   Reply With Quote
Old 08-20-07, 07:45 AM   #2
C Law
Too Much Crazy
 
Join Date: Feb 2005
Location: NY
Bikes: A bunch
Posts: 3,631
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
10 speed shifters do not work with 9 speed cassettes. If you had 9 speed shifters it would work.

AFAIK, there are no 10 speed mountain cassettes yet (or hopefully ever)
C Law is offline   Reply With Quote
Old 08-20-07, 07:55 AM   #3
probable556
pedal head
 
Join Date: May 2006
Bikes:
Posts: 1,006
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Curt Kurt View Post

AFAIK, there are no 10 speed mountain cassettes yet (or hopefully ever)
+1
probable556 is offline   Reply With Quote
Old 08-20-07, 07:57 AM   #4
comoto
Senior Member
 
comoto's Avatar
 
Join Date: Jan 2007
Bikes:
Posts: 81
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Why not? If you adjust the stop right for the 9th gear the shifter will never go past 9. Done it several times. DA? this is on a road bike right? Keep your 10 speed chain for your front sprocket spacing to be correct. You are going to have to experiment with
cable pull adjustments to get it indexing right.

G
comoto is offline   Reply With Quote
Old 08-20-07, 08:07 AM   #5
C Law
Too Much Crazy
 
Join Date: Feb 2005
Location: NY
Bikes: A bunch
Posts: 3,631
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
^ hmm. that is interesting. I always thought that 9 speed spacing (2.56mm) was different enough from 10 speed spacing (2.35mm) that you wouldn't get correct shifting when combining the 10 speed index shifters and 9 speed cassettes.

I guess I stand corrected
C Law is offline   Reply With Quote
Old 08-20-07, 08:16 AM   #6
late
Senior Member
 
late's Avatar
 
Join Date: Oct 2002
Location: Southern Maine
Bikes:
Posts: 8,377
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 17 Post(s)
Even if worse comes to worse, you could get a 9 speed right hand brifter.

Btw, I have that arrangement, XT rear der, 34T cassette, brfiters. It's nice when
things get really steep.
late is offline   Reply With Quote
Old 08-20-07, 08:17 AM   #7
snhrider
NE Roadie
Thread Starter
 
Join Date: Aug 2006
Location: Live Free and Ride
Bikes: 2006 Colnago C50, 2003 DeRosa Merak, 2001 Litespeed Vortex, 2001 Lemond Buenos Aires
Posts: 178
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by comoto View Post
Why not? If you adjust the stop right for the 9th gear the shifter will never go past 9. Done it several times.
When you say "the stop right", is that the like limit screw on the XT/XTR RD.

Quote:
Originally Posted by comoto View Post
DA? this is on a road bike right? Keep your 10 speed chain for your front sprocket spacing to be correct. You are going to have to experiment with cable pull adjustments to get it indexing right.
Yes, this is road bike which I am trying to convert into a climbing bike. Would the 10 speed chain work with the 9-speed XT cassettes ? Eventually I plan to change the front to go to a lower gearing (probably a triple) but that is an entirely different story.
snhrider is offline   Reply With Quote
Old 08-20-07, 08:47 AM   #8
erhan
Newbie
 
erhan's Avatar
 
Join Date: Apr 2005
Bikes:
Posts: 708
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by comoto View Post
Why not? If you adjust the stop right for the 9th gear the shifter will never go past 9.
yea it won't, but it's like not using one gear of a 10 speed cassette. The OP basically asks if a 9 speed cassette can be used with 10 speed shifters. The answer to that is "no", because the spacing is different (Curt Kurt gave the numbers above). 10 speed and 9 speed cassettes are the same width, and it actually has nothing to do with adjusting the stops.

edit: I thought again, and actually it may be possible. The chain will be about 1 mm off at each end of the cassette if the derailleur is adjusted perfectly for the middle cog, which will cause some rubbing and noise.

Last edited by erhan; 08-20-07 at 09:09 AM.
erhan is offline   Reply With Quote
Old 08-20-07, 09:55 AM   #9
well biked 
biked well
 
well biked's Avatar
 
Join Date: Jul 2005
Bikes:
Posts: 7,065
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
There's a way to get the ten speed shifters to move the RD a little further with each click. From Sheldon's site:

http://www.sheldonbrown.com/gloss_aa-l.html#alternate

Whether it works perfectly, YMMV.

And there are IRD ten speed "mtb" cassettes. Expensive, and I personally see no need for them, but they're out there-
well biked is offline   Reply With Quote
Old 08-20-07, 11:07 AM   #10
KendallF
Senior Member
 
Join Date: Jul 2005
Location: Orange Park, FL
Bikes: Ever changing..as of 2-24-09: 2003 Giant TCR Team Once, Sampson titanium, 1992 Paramount Series 3, 2003 Cervelo P3, 70s Raleigh Record fixed gear, 70s Fuji SL-12 commuter, mid 90s Klein MTB. Plus two or three frames lurking, plus 5 wife/kids rides
Posts: 1,341
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I have a cross bike set up exactly this way, with an XT rear derailleur and 9 speed Ultegra shifters, 11-32 cassette. Works beautifully! I'm going to ride that setup in a very hilly race coming up as well.

If you have a 10 speed bike (I don't think the OP specified) you can get a 29 tooth big cog fairly cheaply and make a custom "bailout gear" cassette; I have a friend who's done that.
KendallF 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 02:03 AM.