SRAM SRAM DUALDRIVE User manual

operating instructions
betriebsanleitung
notice d’utilisation
handleiding
brugsanvisning
bruksanvisning

DualDrive · December 2002
2
Precautionary measures,
which protect from possible
accident, injury or danger to
life, or which prevent possible
damage to the bicycle.
These instructions contain important
information on your DualDrive
system.
Cycling with DualDrive is easy. It’s
true. It may surprise you just how
many features your DualDrive
system has.
To make the best possible use of
your DualDrive please take the time
to read these operating instructions
carefully.
Your DualDrive system is almost
maintenance-free. Should you have
any queries that are not answered in
these operating instructions, your
qualified bicycle specialist will be
pleased to help you.
Have a nice time and enjoy
”dualdriving”.
Special advice to assist in
the better handling of the
operation, control and adjust-
ment procedures.
Please take particular note of the
following:
© Copyright SRAM Corporation 2002
Publ. No. 5000 E/D/F/Nl/Dk/Sv
Information may be enhanced
without prior notice.
Released December 2002
SRAM Technical Documentation,
Schweinfurt/Germany
Shimano is a trademark of Shimano Inc., Japan.

DualDrive · December 2002 3
E
CONTENTS
THE DUALDRIVE SYSTEM 4
OPERATION 7
MAINTENANCE AND CARE
» Gear adjustment 8
» Remove and fit rear wheel 10
» Cleaning and Lubrication 11
» Cable change 12
ASSEMBLY OF COMPONENTS 14
TECHNICAL DATA 18
ADDRESSES 110

DualDrive · December 2002
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THE DUALDRIVE SYSTEM
WHAT IS DUALDRIVE
The general perception is that shifting
requires a Zen-like touch from years
of trial and error . . . mostly error.
Many riders wanted something
easier. We really love this kind of
challenge. And DualDrive exceeds
all the expectations.
DualDrive is a drive train consisting
of a self-energized internal hub and
rear derailleur for smooth adjustment.
It’s the market’s most revolutionary
transmission.
OPERATING PRINCIPLE
Single-side shifting allows the rider to
use one-hand to easily click through
a 27-, 24- or 21 gear option. And
DualDrive’s superior gear indication,
featuring three intuitive riding modes,
creates a smooth, comfortable ride
for novice and masters alike. Easy
shifting.
Advanced performance. Mission
accomplished.
RIDING MODES
DualDrive has 3 intuitive shifting
modes. Hill mode, standard mode, and
fast mode. Each mode is designed to
allow the rider to be in the proper
mode wherever you go.
H
i
l
l
S
t
a
n
d
a
r
d
Fast

DualDrive · December 2002 5
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THE DUALDRIVE SYSTEM
DualDrive hub and cassette
Super light shifting forces,
load shiftable. Stand-still shifting
(mode selector): easy re-start at
a traffic light
DualDrive single-sided shifter
Simple gear indication:
one view for all information.
Intuitive logical shifting.
DualDrive rear derailleur
Light, precise shifting.
Larger pivots, links and cages:
increased rigidity and durability.
DualDrive Clickbox
Easy wheel removal:
pre-adjusted gears for simplicity.

DualDrive · December 2002
6
THE DUALDRIVE SYSTEM
HOW LONG DID IT
TAKE TO FINISH
DUALDRIVE?
A big team of 25 engineers from all
around the world worked for two
years on this project.
HOW DID WE TEST
DUALDRIVE?
Enthusiastic trekking riders did test
the system under all weather cir-
cumstance for more than a year.
Within these tests we finetuned the
function of the system to perform to
100% of the comfort trekking riders
expectations.
WHAT PARTS DO I NEED
TO COMPLETE A DUAL-
DRIVE TRAIN?
A DualDrive train contains the
following products:
»DualDrive hub: in either without
brake and disc brake version.
»Cassette: 11-34 teeth, 9 speed for
DualDrive 27 or 11-32 teeth, 8
speed for DualDrive 24 or 12-32
teeth, 7 speed for DualDrive 21.
»Derailleur: DualDrive 9 speed for
DualDrive 27, DualDrive 8 speed
for DualDrive 24 or DualDrive 7
speed for DualDrive 21.
»Shifter with Clickbox: 27 speed
with gear indication window or
24 and 21 speed without gear
indication window.
»Spoke protector: There are two
versions available: in versions for
36 or 32 spoke hole hubs.
»Crank: DualDrive cranks offer the
best performance with the Dual-
Drive system.
I BELIEVE A DUAL-
DRIVE SYSTEM HAS
TO BE HEAVIER THAN
A NORMAL EXTERNAL
DRIVE SYSTEM!
In fact the DualDrive system weighs
around 250 gr less than a standard
derailleur drive train system.
WHAT IS THE BENEFIT
OF THE SINGLE SIDED
SHIFTER?
It is more intuitive due to the riding
modes which explain the driver
directly what mode to use in which
terrain.

DualDrive · December 2002 7
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OPERATION
RIDING MODES
Use the thumb shifter to
choose the gear ratio. You can
operate it in stand still or while
riding. The smoothest and fastest
gear change happens when
changing gears while pedaling.
DERAILLEUR
Use the rotating grip (to the
right) to change gear of the
derailleur system. The smoothest
and fastest gear change happens
when changing gears while
pedaling with low force.
1
21
2

DualDrive · December 2002
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4
5
MAINTENANCE AND CARE
GEAR ADJUSTMENT
GEAR HUB
Place thumb shift lever
in standard mode.
Match up the yellow marks in
the Clickbox viewing window
by twisting the barrel adjuster.
DERAILLEUR
Limit screw adjustment:
View the rear derailleur and
pulleys from behind the rear of
the bicycle.
» Turn the limit screw marked ’H’ on
the outer link of the derailleur to
align the upper guide pulley cen-
ter with the outboard edge of the
smallest cog – clockwise moves
the guide pulley inboard towards
the wheel.
» While turning the crank, push the
rear derailleur towards the larger
cogs by hand.
» Align the upper guide pulley under
the largest cog, by turning the
limit screw marked ’L’ on the outer
link – clockwise moves the guide
pulley outboard away from the
spokes.
3
5
3
4

DualDrive · December 2002 9
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MAINTENANCE AND CARE
GEAR ADJUSTMENT
Chain gap adjustment:
Chain gap is the distance between the
upper guide pulley and the cog the
chain is riding on. Optimal chain gap
allows quick, efficient shifts.
» While turning the crank, push the
rear derailleur inboard by hand to
the largest cog.
» Hold the derailleur in this position
while making the following adjust-
ment.
Use a 3 mm hex wrench, turn
the b-adjust screw until the
chain gap equals approximately
6 mm (1/4”).
– Turn the b-adjust screw clock-
wise to increase the chain gap.
– Turn the b-adjust screw
counterclockwise to decrease
the chain gap.
Do not use the b-adjust screw
to adjust the rear derailleur
to act as a chain-tensioning device
or to prevent chain suck. This
increases the chain gap causing
poor shifting performance.
Index shifting adjustment:
» Make sure the chain is located on
the smallest sprocket.
» Shift the chain to the second cog.
– If the chain hesitates or does not
shift, increase the cable tension
by turning the shifter barrel
adjuster counterclockwise.
–
If the chain shifts beyond the
second cog,
decrease the cable
tension by turning the shifter
barrel adjuster clockwise.
» Repeat the two former steps until
shifting and cable tension is
accurate.
» While turning the crank, shift the
chain up and down the cassette
several times to ensure that your
derailleur is indexing smoothly.
3 mm
6 mm
(1/4")
6
6

DualDrive · December 2002
10
MAINTENANCE AND CARE
REMOVE AND FIT REAR WHEEL
REMOVE REAR WHEEL
» Rotate the twist shifter to the hig-
hest gear position (speed „7/8/9“).
Place thumb shift lever
in hill riding mode.
Push Clickbox button down.
» Pull Clickbox off the axle.
» Dismantle wheel.
Unscrew shifting rod (1)
FIT REAR WHEEL
» Fit wheel in frame dropouts.
Place retaining washers (2) on
both sides of the axle – the
serrations must bear against the
dropout (washers with lugs: these
must engage in the dropout slots).
» Tighten up axle nuts. Tightening
torque 30 – 40 Nm (266 – 350 in. lbs.).
» Screw shifting rod (1) into the hub
axle and thigthen it with 0.2 Nm
(1.8 in. lbs.).
» Push on Clickbox to the stop on
the hub axle. The thumb shift lever
must be positioned in the hill riding
mode and Clickbox button must be
pushed down.
» Bring Clickbox button back to initial
setting by pushing it up from under-
neath.
» Check the gear settings.
7
8
9
7
8
9
9
1
0,2 Nm
2