Compatible shifters with SRAM X.0 rear derailleur

Marc Rosenbaum

Please help, I need some mechanical information. I just mounted a
SRAM X.0 rear derailleur on my Bacchetta Aero to replace the Ultegra
(53-39-26 front, 12-27 rear going to a 12-30 or 12-32) I can't get
the derailleur to shift throughout all 9 cogs on the cassette. The
limit screws are set correctly. Is the Rocket shifter incompatible
with the X.0 derailleur? If not, what else might I be doing wrong?

Will Shimano Dura Ace barcon shifters work with the X.0?

Thanks for any assistance.

Marc

Rick Steele

"Marc Rosenbaum" wrote in message:

> Please help, I need some mechanical information. I just mounted a
> SRAM X.0 rear derailleur on my Bacchetta Aero to replace the Ultegra
> (53-39-26 front, 12-27 rear going to a 12-30 or 12-32) I can't get
> the derailleur to shift throughout all 9 cogs on the cassette. The
> limit screws are set correctly. Is the Rocket shifter incompatible
> with the X.0 derailleur? If not, what else might I be doing wrong?

With SRAM's X.0 RD's you need the SRAM ESP 1:1 ratio shifter. Your SRAM
Rocket is Shimano compatible which is different as you learned.

> Will Shimano Dura Ace barcon shifters work with the X.0?

Only in friction mode, you'd have same problem trying to index the X.0 ESP
RD with a non-ESP shifter. If you want to keep the new RD, get a Right Hand
SRAM 9spd ESP Shifter such as: X.0, X.9, X.7, 9.0 or 7.0..

> Thanks for any assistance.

No problem,

Rick "a Bacchetta Dealer" Steele
Gold Country Cyclery
Cameron Park, CA
http://www.tandems-recumbents.com

Jim Edgar

m_angyo_r@yahoo.com (Marc Rosenbaum) wrote in message news:<41942de4.0404201307.3340a10a@posting.google.com>...
> Please help, I need some mechanical information. I just mounted a
> SRAM X.0 rear derailleur on my Bacchetta Aero to replace the Ultegra
> (53-39-26 front, 12-27 rear going to a 12-30 or 12-32) I can't get
> the derailleur to shift throughout all 9 cogs on the cassette. The
> limit screws are set correctly. Is the Rocket shifter incompatible
> with the X.0 derailleur? If not, what else might I be doing wrong?
>

Bingo.
XO, X9's and X7's (and a few others) all use the SRAM standard amount
of cable pull. They are 1:1, while Shimano Indexes at a 2:1 ratio
(The shifter pulls twice as much cable. I don't know the actual draw
of cable distance, but it h'ain't the same. Rockets list up as
"Shimano Compatible"

http://www.sram.com/mtb/shifters/rocket/twist_shift.asp

> Will Shimano Dura Ace barcon shifters work with the X.0?
Friction Mode is a go. Any friction shifter will work.

SRAM has been talking about a road group, but I haven't seen it and
don't know if it will be compatible with the mountain group. But, you
must have flat-ish bars if you are running the Rocket....

Hope you saved the receipt and the packaging...

-- Jim

Marc Rosenbaum

Got my answer, thanks - not compatible!

m_angyo_r@yahoo.com (Marc Rosenbaum) wrote in message news:<41942de4.0404201307.3340a10a@posting.google.com>...
> Please help, I need some mechanical information. I just mounted a
> SRAM X.0 rear derailleur on my Bacchetta Aero to replace the Ultegra
> (53-39-26 front, 12-27 rear going to a 12-30 or 12-32) I can't get
> the derailleur to shift throughout all 9 cogs on the cassette. The
> limit screws are set correctly. Is the Rocket shifter incompatible
> with the X.0 derailleur? If not, what else might I be doing wrong?
>
> Will Shimano Dura Ace barcon shifters work with the X.0?
>
> Thanks for any assistance.
>
> Marc

James Thomson

> > Will Shimano Dura Ace barcon shifters work with the X.0?

"Jim Edgar" <jim@cyclofiend.com> wrote:

> Friction Mode is a go. Any friction shifter will work.

Not this combination. There isn't enough throw in a Dura Ace barcon to
accommodate the unusual cable-pull requirement of an X.0 derailleur.

James Thomson