concentriq

Hello! I have a 10 speed cassette, a 10 speed shifter 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 has enough swing to make 10 shifts, not 9. I may be missing something but 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".

Thank you in advance!

HillRider

Did your Campy 9-speed rd used with a 10-speed cassette shift properly before the chain broke? If so, it's obviously compatible with a 10-speed brifter. The "speeds" are in the shifter. The derailleur only follows orders as long as the geometry is compatible and most of them are.

I'm not that sure about the ins and outs of Campy's various derailleurs but since the era of indexing Shimano's rear derailleurs, with only two exceptions I know of (8-speed and earlier Dura Ace and current 10-speed MTB), are completely agnostic about the number of "speeds" shifters they are paired with. A 7-speed era Shimano rd works just fine with a 10-speed brifter.

fietsbob

shifters in front get there a little sooner but at the same rate
as the derailleur in the back

HillRider

**********?

concentriq

thank you for your reply: shifting was always a LITTLE funny on that bike, but I always attributed it to my inability to properly adjust the gears ;-). Would a 10 speed chain in a 9 speed derailleur caused it?

HillRider

No, it's not the chain. Campy has changed their rear derailleur geometry a couple of times and I believe there have been at least two generations of "9-speed" rear derailleurs over the years. You may have the "wrong" one but i'll defer to a more well versed Campy expert on this particular subject. Posting the model number of yours should help.

fietsbob

Did you replace the chain when you did the conversion? or is it worn?

the cable pulls the rd the amount the lever detent commands.

cable stretch during break in changes the interval a bit.
put the bike on the repair stand, and check the adjustment.