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Converting Campy Chorus derailleur form 9 to 10 speeds(6 posts)

Converting Campy Chorus derailleur form 9 to 10 speedsacp
Mar 3, 2003 7:20 AM
How difficult is to convert a 9 speed Chorus rear derailluer from 9 to 10 speeds? How is it done?

Thanks
re: Converting Campy Chorus derailleur form 9 to 10 speedsMR_GRUMPY
Mar 3, 2003 7:57 AM
If it is an old 9 speed, it can't be done. If it's a "new" one, it will work fine.
As Mr Grumpy stated, the year of the derailleur depends if it...Cima Coppi
Mar 3, 2003 8:07 AM
may or may not work. If you have >2000 model year, you simply need to change the pulleys to the narrower 10-speed pulleys. If you have the older 9-speed model, the articulation of the derailleur is not compatible with the current 10-speed mechanism in the right side ergo lever.
re: Converting Campy Chorus derailleur form 9 to 10 speedsTommasini
Mar 3, 2003 11:21 AM
Check With Tim at Branfordbike.com - he may have a shift lever indexing cog that can get an older chorus shifting 10 speeds (plus the pulleys)
re: Converting Campy Chorus derailleur form 9 to 10 speedsmackgoo
Mar 3, 2003 2:30 PM
As was said, if it is the appropriate year then you need to change the pulley wheels. Of course you would need a 10sp ergo, wether you replace the ratchet in your 9sp with a 10sp one, about 30$ and you may as well get the two "D" springs while your in there, or you get a new 10sp ergo. Why one would do that I don't know. Thus is the beauty of Campy.
Probably depends on how perfect you want it.Bonked
Mar 4, 2003 10:31 AM
I have an older bike with a 7-speed Shimano derailleur on an 8-speed hub and it works OK. Do I get the quickest shifting, no. Do I get flawless performance in all gears, no. Does it work, yes.