FWIW. My first Campagnolo-Shimano mix-and-match was a 10-speed Campagnolo shifter & an XT 750 rear derailleur just because I wanted to see what the result would be. When dry-shifting ([COLOR= #808080]
i.e., what 'I' call checking the shifting sans chain[/COLOR]) the rear derailleur, it looked like the configured the mismatch was very close to
8-speed Shimano indexing ...
So, I put an 8-speed Shimano XTR (12-30 --
unramped cogs) cassette on the wheel & it was
"perfect" ...
At about the same time, thanks to SANTANA, I learned that the
hubbub.com rear derailleur cable connection was used by Tandem riders to recreate 9-speed Shimano indexing -- it was the "solution" for Campagnolo users who wanted to use a cassette whose largest cog had more than 29t. THAT sounded like an option which I wanted to use ...
The
hubbub connection worked!
And, subsequently, the
hubbub'd Shimano 9-speed rear derailleur became my favored connection when mated with a Campagnolo shifter until I speculated that the geometry of the then-new 10-speed Shimano Road rear derailleur might be equivalent to the geometry of a
hubbub'd 9-speed Shimano rear derailleur.
- I ponied up for a 105 rear derailleur ([COLOR= #808080]why pay more on a spec?[/COLOR]) ...
- as far as I am concerned, 'my' speculation was-and-is correct ...
- but, OTHERS have insisted that the geometry of the 9-speed & 10-speed Shimano Road derailleurs is the same ... it may be, but I don't think so similarly, I don't know what OTHERS are doing when they say they have interchanged 10-speed Shimano shifters with 9-speed derailleurs, and vice-versa ... whatever works, right?
- but, it may work for them because ramped Shimano ([COLOR= #808080]and, SRAM[/COLOR]) cassettes are VERY FORGIVING as long the chain isn't too wide ([COLOR= #808080]i.e., you don't want to use an 8-speed Shimano chain on a 9-speed Shimano drivetrain[/COLOR])
[*] by my reckoning ([COLOR= #808080]which is confirmed by the Juden table [[/COLOR][COLOR= #008000]below[/COLOR][COLOR= #808080]][/COLOR]), 9-speed Shimano indexing can be achieved when a 10-speed Shimano shifter + 9-speed Shimano rear derailleur if the cable is attached to a 9-speed Shimano rear derailleur at 9 o'clock ...
I can't remember whose post-or-reference originally pointed me to this table ([COLOR= #808080]by
Chris Juden[/COLOR]):
What few seem to understand when looking at the table is that "
old Dura Ace" refers to attaching the rear derailleur cable at
9 o'clock -- essentially, the opposite of using a
hubbub.com connection -- and,
not to using an SIS Dura Ace rear derailleur.
- BTW. By my reckoning, if you hook up a 10-speed SRAM shifter to a 9-speed Shimano rear derailleur using the "old Dura Ace" connnection, then it should ([COLOR= #ff0000]?!?[/COLOR]) result in 9-speed Shimano indexing; but, maybe not ([COLOR= #808080]the table certainly does not suggest viability[/COLOR]) ...
- BTW2. SRAM is probably stuck with 10-speed for at least another year-or-two because Shimano's pending 11-speed drivetrains have SRAM's R&D in limbo until they ([COLOR= #808080]SRAM[/COLOR]) learns what the 11-speed Shimano indexing is ... SRAM's R&D is apparently still scrambling to come up with a new shape for their Road shifters even though they should, IMO, have had a few potential designs in the wings as soon they say Campagnolo's 11-speed shifters ...
The bottom line is that 9-speed Shimano indexing should be a viable option for many years to come if you aren't wedded to using 9-speed Shimano shifters ...