's Forum Archives - Components

Archive Home >> Components(1 2 3 4 5 6 7 8 9 10 )

Campy 9/10 speed compatibility(7 posts)

Campy 9/10 speed compatibilityMel Erickson
Oct 30, 2003 1:44 PM
Will a Campy Chorus 9spd crankset work with a campy 10spd setup? Will a Chorus 9spd front derailleur work with a 10spd set up? Inquiring and neophyte Campy minds want to know. I'm putting together a winter project and want to equip it with a Chorus 10spd drivetrain. Looking at used parts on Ebay but am not sure what (if any) 9spd parts will work with 10spd. Any help will be appreciated.
Yes on both questions (nm)TJeanloz
Oct 30, 2003 1:50 PM
Though, theoretically, a ten speed front derailleur would be better.
re: Campy 9/10 speed compatibilityMR_GRUMPY
Oct 30, 2003 2:06 PM
You might have a slight problem if you shift while standing because of the wider spacing of the rings. It may take a second or two to move. On my Chorus 8 speed bike, I use an old super record front derailleur, because I like the way it looks. I just make sure I'm sitting when I change rings.
the differences...C-40
Oct 30, 2003 2:15 PM
When in doubt, Campy has a FAQ technical area that covers most compatibility issues.

The front derailleur and crank will work, but neither is exactly like a 10-speed model. The front has a small plastic insert that I believe can be retrofit into the Record front derailleur. The only difference in the crankset is the big chainring, which has thinner mounting tabs that move it .4mm closer to the little chainring. also has good info on campy compatibility issues:

I'm trying to decide whether to sell my Record double crank, R/D, F/D and Chorus BB. Making the switch to a triple on the C-40. I can ride the mountains on a double, but the triple makes more sense.
the differences...Mel Erickson
Oct 30, 2003 2:51 PM
If you decide to sell your Record double drivetrain give me a holler, mericson at charter dot net.
re: Campy 9/10 speed compatibilitybimini
Oct 31, 2003 7:49 AM
Crank set will work. The 10 speed large chain ring does have a spot milled out at each mounting surface that brings the large chainring .4mm closer to the small ring. The 9 speed should work but there is a risk of the chain jamming between the two rings. You can buy a new 10 speed large ring to solve the potential problem. The front derailleur is slightly narrower for the 10 speed chain. The 9 will work but the 10 will work better.

You have to have a 10 speed chain. You have to have 10 speed rear cassette. Hubs are the same (I think). The rear derailuer is the same except the jockey wheels are slightly narrower. You should get new jockey wheels and jockey wheel bolts.

You will also need new shifters (I don't know if the 9s can be modified to 10s).
I did a little research on Campy's siteMel Erickson
Oct 31, 2003 9:08 AM
Seems a 9spd Record front der. can be modified for 10spd use by screwing in essentially a fiber shim to the inside of the outer plate. This will not work on Chorus or any other 9spd der. because their cages lack the necessary holes. I understand the 9spd will probably work ok without modification. Do you think a Chorus 9spd cage could be drilled to accept the shim? Could a similar shim be simply glued in place? Anyone tried this?