can I use a 10 speed rear mech with my 9 speed shifter?
11-16-14, 07:03 AM
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can I use a 10 speed rear mech with my 9 speed shifter?
Obviously, I can, but....is it worth it. I'm looking for a campag 9 speed rear mec. (cheap!) and I've seen a 10 speed going cheap. Is it a worthwhile exercise, or can it cause problems I haven't thought of? I could easily adjust it to lose 1 sprocket, or should I wait for Fatty Crimbo to bring me a nice, shiny 9 speeder...?
11-16-14, 09:00 AM
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11-16-14, 09:12 AM
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From what I can see around the web, new style 9 speed and 10 speed derailleurs have the same pull ratio so should be interchangeable. I saw a reference that you might need to run a 10 speed chain or replace the jockey wheels with 9 speed - wouldn't think the tolerance would be that close.
Last edited by Slash5; 11-16-14 at 09:16 AM.
11-16-14, 10:04 AM
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Thanks for the answers. I couldn't really see any reasonfor a 10 speed not to work once adjusted (correctly), but just thought I'd check. I now need to cross my fingers that a short arm mech. will have a range of 31 teeth... I may have to not use small-small or big - big, but life is all about challenge....Gosh, that's a bit of philosophy, wow, I've impressed myself
11-16-14, 10:09 AM
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Short arm Campy should work to 31 teeth range. I think that is the limit of the spec, and people have used it for a few more too.
11-16-14, 10:57 AM
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Obviously, I can, but....is it worth it. I'm looking for a campag 9 speed rear mec. (cheap!) and I've seen a 10 speed going cheap. Is it a worthwhile exercise, or can it cause problems I haven't thought of? I could easily adjust it to lose 1 sprocket, or should I wait for Fatty Crimbo to bring me a nice, shiny 9 speeder...?
Old derailleurs have a conventional B-tension adjustment, new ones have the adjustment on the lower pivot.
Campagnolo made the freehub about 1mm wider with the move to 9 cogs. The 10th cog is dimpled or on a recessed carrier so it's past the splines making the whole thing even wider, so Campagnolo had to tweak the actuation ratio to reach it.
For a while replacement index cams were available although that's no longer the case.
Last edited by Drew Eckhardt; 11-16-14 at 11:13 AM.
11-16-14, 11:05 AM
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Thanks for the answers. I couldn't really see any reasonfor a 10 speed not to work once adjusted (correctly), but just thought I'd check. I now need to cross my fingers that a short arm mech. will have a range of 31 teeth... I may have to not use small-small or big - big, but life is all about challenge....Gosh, that's a bit of philosophy, wow, I've impressed myself
Medium (like the 8/9 speed era Racing-T) is for doubles with all cogs, and triples all cogs except 13-29/12-30
Long is for more
There's some wiggle room based on hanger dimensions.
In the unlikely event you go over, size for big x big and a slack small x small so you don't break parts.
Last edited by Drew Eckhardt; 11-17-14 at 09:04 AM.
11-16-14, 05:55 PM
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11-16-14, 07:55 PM
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11-16-14, 11:27 PM
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It depends. 2000 and older 9 speed shifters use a different actuation ratio and won't work well with a 10 speed derailleur. 2001 and newer 9 speed shifters share the 10 speed actuation ratio so they're compatible.
Old derailleurs have a conventional B-tension adjustment, new ones have the adjustment on the lower pivot.
Campagnolo made the freehub about 1mm wider with the move to 9 cogs. The 10th cog is dimpled or on a recessed carrier so it's past the splines making the whole thing even wider, so Campagnolo had to tweak the actuation ratio to reach it.
For a while replacement index cams were available although that's no longer the case.
Old derailleurs have a conventional B-tension adjustment, new ones have the adjustment on the lower pivot.
Campagnolo made the freehub about 1mm wider with the move to 9 cogs. The 10th cog is dimpled or on a recessed carrier so it's past the splines making the whole thing even wider, so Campagnolo had to tweak the actuation ratio to reach it.
For a while replacement index cams were available although that's no longer the case.
Flagging this for reference via the mentions tab on your profile.
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11-17-14, 10:58 AM
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Probably short for "mechanism."
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