9-speed. PG-970Option 1::
11-34T*. Option 2:: 11-32T*.
Recommended Chain:: PC-991,
PC-971, PC-951. Lock Ring::
*Satin Chrome. Finish:: Satin
Chrome. ...

8-speed. PG-830Option 1::
11-32T. Option 2:: 11-30T.
Option 3:: 11-28T. Recommended
Chain:: PC-38. Lock Ring::
Steel. Finish:: Chrome Plated.
...

The 11-25 sprocket set springs
from the demand from
professionals for a broader
set of ratios, suitable for
steeper climbs but also for
faster descents, but it also
stems from the demand from
amateurs who along with
compact cranks wanted ratios
which would make it possible
to push in descent without
giving up the agility in
ascent offered by the 25-tooth
sprocket, as well as 34 or 36
ones. 11-25, 12-23, 12-25,
13-26, 13-29. Ultra·Drive™ -
single sprockets - galvanized
- supplied without lockring...

Free Wheel to screw. To renew
your old cassette with
high-performance stuff. ...

The "OpenGlide" shiftingof the
2007 SRAM OG-1070 will provide
crisp, positive shifting under
anycircumstance -- a mellow
spin, or at max power on a
steep climb. The first timeyou
set eyes on the OG-1070 you'll
likely have the alarming
realization that onetooth is
missing from each of the 5
high cogs. These missing teeth
have twopurposes: It serves as
a gateway that allows the
chain to shift fluidly
nomatter what kind of stress
you're putting the bike under.
And it allows theOG-1070 to
weigh in a...