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Speed difference between derailleur and shifters

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concentriq Offline
New Member


Posts: 2
Joined: Jan 2012
Post: #1
Speed difference between derailleur and shifters
I have a 10 speed cassette, a 10 speed shifters and a 9 speed derailleur. All are campagnolo centaur. I didnt even realize that i had a difference in speeds until my chain broke the other day and i took a closer look (Bought a complete bike off of classifieds last year). My question is: do I need to make sure that derailleur matches that speeds of the shifter of it doesnt really matter? The reason why I ask is when i shift, it seems that the derailleur is making 10 shifts, not 9.

Thank you in advance
Jan 10, 2012 01:30 PM
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bobtravers Offline
Senior Member


Posts: 156
Joined: Oct 2010
Post: #2
RE: Speed difference between derailleur and shifters
Doesn't make a difference, since it's the shifter who's giving you 10 speed... You rear derailleur only follow the cable position that the shifter is onto...
Jan 10, 2012 06:43 PM
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concentriq Offline
New Member


Posts: 2
Joined: Jan 2012
Post: #3
RE: Speed difference between derailleur and shifters
Yeah, I figured as much: was just wondering why there is speed marking on the derailleur at all then? I thought that maybe "9 speed" on the derailleur meant "up to 9 speed", and since I had a 10 sp shifter/cassette, thoguth it may be a bit of an issue. Thank you anyways!
Jan 12, 2012 09:17 AM
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Bill Offline
Veteran Member

NY,USA
Posts: 2,766
Joined: Sep 2009
Post: #4
RE: Speed difference between derailleur and shifters
Most 9spd derailers can do 10 gears. like there are 5,6,7 deraillers that say they only do one speed.

Good maintenance to your Bike, can make it like the wheels are, true and smooth!
Jan 12, 2012 07:42 PM
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