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10 speed cassette on 9 speed system

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10 speed cassette on 9 speed system

Old 11-21-09, 03:17 PM
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10 speed cassette on 9 speed system

so my primary bike is out of commission, and my backup bike currently doesn't have any wheels...

so i was wondering, if i put my wheels with the 105 cassette on the backup bike with tiagra shifters, will anything bad come of this (assuming i'm using the outer 9 cogs)?
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Old 11-21-09, 03:30 PM
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The 9 speed shifter moves the derailleur 11% more with each click than a 10 speed does. So it won't line up with a 10 speed cassette.
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Old 11-21-09, 05:25 PM
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Originally Posted by zzyzx_xyzzy
The 9 speed shifter moves the derailleur 11% more with each click than a 10 speed does. So it won't line up with a 10 speed cassette.
Won't work anyways. It'll be a 9s chain on a 10 cog set.
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Old 11-21-09, 05:57 PM
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You could swap the cassette as well.
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Old 11-21-09, 06:21 PM
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Originally Posted by Steev
You could swap the cassette as well.
and the chain.
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Old 11-21-09, 06:54 PM
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But you still have the 9 speed shifters. I'm reading that he doesn't have wheels or possibly cassette for the backup bike which is 9 speed. In which case moving his 10 speed chain, cassette and wheels to the 9 speed bike gets him nothing that works.

Now that said, you all are 100% correct IF he has the 9 speed cassette and chain that were originally on the backup bike. Then he can swap cassettes and be down the road.
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Old 11-21-09, 07:09 PM
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Originally Posted by Steev
You could swap the cassette as well.
He doesn't have wheels to swap them from.
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Old 11-21-09, 07:09 PM
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Originally Posted by CCrew
But you still have the 9 speed shifters. I'm reading that he doesn't have wheels or possibly cassette for the backup bike which is 9 speed. In which case moving his 10 speed chain, cassette and wheels to the 9 speed bike gets him nothing that works.

Now that said, you all are 100% correct IF he has the 9 speed cassette and chain that were originally on the backup bike. Then he can swap cassettes and be down the road.
You could probably get it to maybe shift into a couple of gears. You can definitley get it to be a singlespeed or at the very least whatever the amount of chainrings he has up in the front.
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Old 11-21-09, 11:11 PM
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To sum up what others have said: the speed of the cassette, chain, and rear shifter need to match. (Edit: on second thought, the chain can actually be a higher-speed.)

Last edited by JiveTurkey; 11-21-09 at 11:17 PM.
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Old 11-22-09, 09:52 AM
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Buy a rear wheel & 9 speed cassette for the back-up bike.

The back-up bike should be operational after all.

Michael
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Old 11-22-09, 12:03 PM
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Originally Posted by Barrettscv
Buy a rear wheel & 9 speed cassette for the back-up bike.

The back-up bike should be operational after all.

Michael
After re-reading post #1, i'm under the impression he doesn't have a front or a rear.
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Old 11-22-09, 01:19 PM
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Originally Posted by operator
You could probably get it to maybe shift into a couple of gears. You can definitley get it to be a singlespeed or at the very least whatever the amount of chainrings he has up in the front.
Hardly an "as designed" situation, and I'm sure not what the OP is looking for. Hence I'll stick to my "nothing that works" and clarify it with "properly" - thanks.
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Old 11-22-09, 01:25 PM
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Originally Posted by CCrew
Hardly an "as designed" situation, and I'm sure not what the OP is looking for. Hence I'll stick to my "nothing that works" and clarify it with "properly" - thanks.
That wasn't an attack on your post, chill.
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Old 11-22-09, 02:12 PM
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Originally Posted by operator
After re-reading post #1, i'm under the impression he doesn't have a front or a rear.
He could simply use the front from the other bike.
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