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PostPosted: Sun Nov 03, 2013 7:47 pm 
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Joined: Thu Jul 16, 2009 9:33 pm
Posts: 339
I have a 2x10 sram xx front derailleur,but i would like to go to 2x9 gearing,so my question is,is it work?? Is this a big problem to have 10speed front derailleur with 9speed chain?? I have to say,that i can use it with an old sram gripshift so i can move the derailleur a bit on the lower or on the highest gears.

Thanks


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Posted: Sun Nov 03, 2013 7:47 pm 


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PostPosted: Sun Nov 03, 2013 8:02 pm 
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Joined: Fri May 25, 2007 6:43 pm
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With careful seting up (as always) it'll work fine


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PostPosted: Sun Nov 03, 2013 8:40 pm 
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Location: Sofia, Bulgaria
It will work, as I have been running similar setup (10 speed XTR front) with 9 speed chain some time ago. Now I run 10 speed chain on 9 speed cassette and all is well. The 10 speed chain (KMC X10-SL), because it is lighter ;-)


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PostPosted: Sun Nov 03, 2013 10:10 pm 
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Sorry guys,i make a mistake,I have 8 speed cassette(just too many years of riding with 9sp). So,how about that?? Will or wont work?


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PostPosted: Mon Nov 04, 2013 8:48 am 
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You are getting closer to not working. 8 speed chains are wider than 9 (and 10) so you may be getting into modifying the front mech cage to fit over the chain and make the shift without rubbing.

Also, if you are using an 8 speed chainset modified to a double, you may find the throw of the 10 speed front mech might not be quite enough (depending on if you are using an 8 speed compatible front shifter. Some combinations work some won't. If its a 10 speed (or 9) chainset, it might work better. You could also try a 9 speed chain to gain some space.

All said and done, if you are willing to spend some time tinkering you should be able to get it to function acceptably.
(i've got an "impossible" set up to work, a mish-mash of road, mtb, triple, double, 8 and 9 speed)


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PostPosted: Mon Nov 04, 2013 9:20 am 
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So,using 9speed chain on 8speed cassette is better idea than 8/8 set?? Is 9 speed chain working good on 8speed cassette??


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PostPosted: Mon Nov 04, 2013 10:01 am 
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In my experience you can safely (i.e. it still works ok) use a slightly narrower chain, so a 9 speed chain on 8 speed cassette will work, same using a 10 speed chain on a 9 speed cassette and so on.
The issue is at the front. What chainset/rings/shifter will you use?


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PostPosted: Mon Nov 04, 2013 2:23 pm 
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If I'll use 9speed chain I'm gonna use 9speed chainrings,probably shimano,or truvativ 42/26T.


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PostPosted: Mon Nov 04, 2013 2:35 pm 
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You'll probably manage fine then, just some tweaking of the top and bottom stops.


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PostPosted: Mon Nov 04, 2013 2:57 pm 
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Thanks!:)


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PostPosted: Mon Nov 04, 2013 3:04 pm 
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Joined: Fri Dec 11, 2009 10:38 pm
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Location: Welland, Ontario
Definitely you can run a 9-spd chain on an 8-spd cassette. I'm doing it and it shifts better for it.

The 9-spd chain will be slightly wider outside than a 10-spd - approx 0.6mm, so as the others say most 10-spd FD's are probably going to be fine. Perhaps a little more finicky to set up, but will work.

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PostPosted: Mon Nov 04, 2013 5:13 pm 
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I thinking about X.0 on front


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PostPosted: Wed Nov 06, 2013 3:45 pm 
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Location: Midlands, United Kingdom
Shimano low mount are one of the lightest you'll find, a Deore triple is just 156g and a double specific 124g, not sure about the X0 but that is lighter than an X9 (175g for a triple) by a margin and much cheaper.

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Posted: Wed Nov 06, 2013 3:45 pm 


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PostPosted: Thu Nov 07, 2013 10:43 am 
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Maybe you're right,but in my frame i have direct mount only:) so x0 is one of the lightest (xx is only lighter). I think my bike shoul be ready in next week,so i will give you an answer is everything is ok with gearing.


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