Shimano XTR M970 M972 Rear Derailleur User Manual

User Manual: Shimano XTR M970-M972 Rear Derailleur User Manual

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XTR Rear Derailleur (9-Speed)

RD-M970-GS
RD-M970-SGS

Long Cage
Super Long Cage

12
11

7
8

5
10

SGS-Type
7

3
2

9
12

8
9
10
11
12

SHIMANO
CODE NO.
Y-5VW 98010
Y-53M 21000
Y-5VW 98020
Y-5VW 98030
Y-5U5 25100
Y-5VW 98040
Y-5VW 98050
Y-5VW 98060
Y-5U5 26000
Y-559 19200
Y-5VW 98090
Y-5VW 98100
Y-5U5 09100
Y-5U5 10100

DESCRIPTION
B-Axle Assembly
B-Tension Adjusting Screw (M4 x 12)
Stroke Adjusting Screws (M4 x 11.5) & Plate
Cable Fixing Bolt (M6 x 8) & Plate
Cover
Plate Axle Assembly
Outer Plate Assembly (GS-Type)
Outer Plate Assembly (SGS-Type)
Outer Plate Pin Cover
Plate Stopper Pin
Pulley Bolt Unit
Tension & Guide Pulley Set
Inner Plate (GS-Type)
Inner Plate (SGS-Type)

A: Same parts.
B: Parts are usable, but differ in materirals, appearance, finish, size, etc.
Absence of mark indicates non-interchangeability.

-M
7
RD

-M
9

-M
9
RD

ITEM
NO.
1
* 2
3
4
* 5
6
*
7

INTERCHANGEABILITY
A
B
A
A
B
A
A
A
B
A
B
A
B
A
B
A
A
A
B
A
B
B
A
B
B
A
B
B
A
B
0607-2606

General Safety Information

In order to realize the best performance, we recommend
that the following combination be used.

• Use neutral detergent to clean the chain. Do not use alkali-based or acid based
detergent such as rust cleaners as it may result in damage and/or failure of the
chain.
• Use the reinforced connecting pin only for connecting the narrow type of chain.
• There are two different types of reinforced connecting pins available. Be sure to
check the table below before selecting which pin to use. If connecting pins other
than reinforced connecting pins are used, or if a reinforced connecting pin or tool
which is not suitable for the type of chain is used, sufficient connection force may
not be obtained, which could cause the chain to break or fall off.
Chain

XTR

Series

WARNING

Reinforced
connecting pin

9-speed super narrow
chain such as
CN-7701 / CN-HG93
8- / 7- / 6-speed narrow
chain such as
CN-HG50 / CN-IG51

Chain tool

Silver

TL-CN32 / TL-CN23

Black

TL-CN32 / TL-CN23

Specifications

DUAL CONTROL lever

ST-M975

Model number

Outer casing

SIS-SP41

Type

Rear derailleur

RD-M970

Gears

Type

SGS / GS

Freehub

Installation of the lever

Rear Derailleur

Use a handlebar grip with a maximum
outer diameter of 32 mm.

RD-M970
SGS

Total capacity

43T

33T

FH-M975 / FH-M970

Largest sprocket

34T

Smallest sprocket

11T

Front chainwheel tooth difference

22T

Gears
Cassette sprocket

CS-M970

Chain

CN-7701

Cutting the outer casing
4 mm Allen key

Tightening torque :
6 - 8 N·m {53 - 69 in. lbs.}

Attach the same outer
end cap to the cut end
of the outer casing.

In the case of carbon handlebars, it may be
necessary to lower the tightening torque in
order to prevent damage to the handlebar.
Please consult the bicycle or handlebar
manufacturer regarding the appropriate
level of tightening torque for carbon
handlebars.

The sealed cap with
tongue and the rubber
shield should be
installed to the outer
casing stopper of the
frame.

SM-SP17 / SM-BT17

Bottom bracket guide

Outer end cap

Be careful not to bend

Rubber shield

Sealed cap with tongue
Rubber shield

6.5mm

7.1mm

• If it is necessary to adjust the length of the chain
due to a change in the number of sprocket teeth,
make the cut at some other place than the place
where the chain has been joined using a reinforced
connecting pin or an end pin. The chain will be
End Pin
Link Pin
damaged if it is cut at a place where it has been
joined with a reinforced connecting pin or an end pin.
• Check that the tension of the chain is correct and that the chain is not damaged. If
the tension is too weak or the chain is damaged, the chain should be replaced. If
this is not done, the chain may break and cause serious injury.
• Obtain and read the service instructions carefully prior to installing the parts.
Loose, worn, or damaged parts may cause injury to the rider. We strongly
recommend only using genuine Shimano replacement parts.
• Read these Technical Service Instructions carefully, and keep them in a safe place
for later reference.
Reinforced Connecting Pin

These Service Instructions describe the operation method when using the ST-M975 DUAL CONTROL lever in combination with the RDM970 reverse spring-type rear derailleur. If using in combination with the RD-M971 top normal-type derailleur, the operations will be
reversed.

Operating the levers
■ Operating the brake
lever

Note

• If gear shifting operations do not feel smooth, wash the derailleur and lubricate all
moving parts.
• If the amount of looseness in the links is so great that adjustment is not possible,
you should replace the derailleur.
• You should periodically clean the derailleur and lubricate all moving parts
(mechanism and pulleys).
• If gear shifting adjustment cannot be carried out, check the degree of parallelism at
the rear end of the bicycle. Also check if the cable is lubricated and if the outer
casing is too long or too short.
• If you hear abnormal noise as a result of looseness in a pulley, you should replace
the pulley.
• If the chain keeps coming off the sprockets during use, replace the sprockets and
the chain.
• Adjust the RD-M970 reverse spring type rear derailleur from the low side.
• Use a frame with internal cable routing is strongly discouraged as it has tendencies
to impair the SIS shifting function due to its high cable resistance.
• Always be sure to use the sprocket set bearing the same
Group marks
group marks. Never use in combination with a sprocket
bearing a different group mark.
• Use an outer casing which still has some length to spare even
when the handlebars are turned all the way to both sides.
Furthermore, check that the shifting lever does not touch the
bicycle frame when the handlebars are turned all the way.
• Make sure that the gear shifting cable and the brake cable do
not obstruct each other during braking operations. If they do
obstruct, it may interfere with braking.
Install the cables so that they still have some slack in them even when the
handlebars are turned fully in either direction.
• A special grease is used for the gear shifting cable (SIS-SP41). Do not use DURAACE grease or other types of grease, otherwise they may cause deterioration in
gear shifting performance.
• Grease the inner cable and the inside of the outer casing before use to ensure that
they slide properly.
• For smooth operation, use the specified outer casing and the bottom bracket cable
guide.
• Operation of the levers related to gear shifting should be made only when the front
chainwheel is turning.
• Parts are not guaranteed against natural wear or deterioration resulting from
normal use.
• For maximum performance we highly recommend Shimano lubricants and
maintenance products
• For any questions regarding methods of installation, adjustment, maintenance or
operation, please contact a professional bicycle dealer.
ag - 18T

ag -15

■ Gear shifting operation
The INSTANT RELEASE
mechanism makes fast gear
shifting possible because
cable tension is released
immediately when either the
main lever or the secondary
release lever is depressed.
The levers are also equipped
with a MULTI RELEASE
mechanism so that you can
now shift two gears with a
single operation.

The lever always returns to the initial position when it is released
after shifting. When operating the lever, always be sure to turn the
crank arm at the same time.

SIS Adjustment
Install the chain with the Pro-Set
alignment block still attached.
After installing, remove the Pro-Set
alignment block.
Turn the crank arm to set the
derailleur to the low position.

The end of the outer casing
which has the aluminum cap
should be at the derailleur side.

4. How to use the B-tension adjustment screw
1. Low adjustment
Turn the low adjustment screw so that the guide pulley moves to
a position directly in line with
the largest sprocket.

Lever initial position
Largest
sprocket
Low adjustment
screw

Adjusting the grip width

B-tension
adjustment screw

It is recommended that you adjust the grip widths of the levers to
the most comfortable widths for gear shifting and braking.

1st joint

Approx.
2 mm

To shift from a small sprocket to a larger sprocket
(MULTI RELEASE )

2. Top adjustment

You can vary the lever stroke to shift the desired number of gears,
so that to shift by one gear only, move the lever to the (1) position,
and to shift by two gears at one time, move the lever to the (2)
position. A maximum two-gear shift can be made in this manner.

Lever end

Turn the crank arm while pulling the derailleur with your hand to
move the derailleur to the top position, and then turn the top
adjustment screw to adjust so
Outer line of
smallest sprocket
that the guide pulley is in line
with the outer line of the
smallest sprocket when looking
from the rear.
Turn the crank arm to set the
derailleur to the low position.

5. SIS Adjustment
Push lever while turning the crank arm to move the derailleur to
the largest sprocket. Then operate lever once to move the
derailleur to the 2nd-gear sprocket. After this, operate lever just
as far as the extent of play, and then turn the crank arm.
When changing
to 3rd

When no
noise is
heard at all

Adjustment bolt

Top adjustment
screw

ag
-1

Lever initial position

Adjustment bolt

Guide pulley

SH
IM

Becomes
narrower

Auxiliary release lever

3. Connecting and securing the inner cable

Becomes wider

Operate the lever eight times or more
to set the lever to the lowest position.
Then remove the inner hole cover and
connect the inner cable.

2 mm Allen key

Turn the cable adjustment bolt
clockwise to tighten it until the
chain returns to the 2nd sprocket.
* Turn the adjustment bolt together
with the outer casing adjustment
barrel cover.

Installation of the rear derailleur

Inner hole cover

When installing, be careful not to let the B-tension adjustment screw
come into contact with the dropout tab, otherwise deformation may result.
Do not remove the Pro-Set alignment block at this time.

Inner cable

5 mm Allen key

B-tension
adjustment screw

Bracket spindle Tightening torque :
8 - 10 N·m {70 - 86 in. lbs.}

Connect the inner cable to
the derailleur as shown in
the illustration.

* Turn the adjustment bolt together with
the outer casing adjustment barrel
cover.

Best setting
The best setting is when the cable adjustment bolt is tightened
(turned clockwise) until noise occurs without lever being
operated, and then loosened (turned counterclockwise) 90 - 180
degrees from that point.
Operate lever to change gears, and check that no noise occurs
in any of the gear positions.

Note: Be sure that the cable is
securely in the groove.
Groove

The length of A will vary depending on the movement of the
rear suspension. Because of this, an excessive load may be
placed on the drive system if the chain length is too short. Set
the length of the chain by adding two links to the chain when
the rear suspension is at a position where dimension "A" is
longest and the chain is on the largest sprocket and the largest
chainring. If the amount of movement of the rear suspension is
large, the slack in the chain may not be taken up properly when
the chain is on the smallest chainring and smallest sprocket.

Turn the cable adjustment bolt
counterclockwise to loosen it until
the chain touches a sprocket and
generates noise.

Inner hole cover

Install the inner hole cover by turning it as
shown in the illustration until it stops. Do not
turn it any further than this, otherwise it may
damage the thread on the cover.
Tightening torque :
0.3 - 0.5 N·m {3 - 4 in. lbs.}

O
AN

HYPERGL I DE - C

Chain length on bicycles with rear suspension

SI-5VW0A

Mount the chain on the smallest chainring and the largest
sprocket, and turn the crank arm backward. Then turn the
B-tension adjustment screw to adjust the guide pulley as close to
the sprocket as possible but Largest sprocket
Smallest sprocket
not so close that it touches.
Next, set the chain to the
smallest sprocket and
repeat the above to make
sure that the pulley does
not touch the sprocket.

Guide pulley

Dropout tab

Technical Service Instructions

Aluminum cap

Pro-Set alignment block

To shift from a large sprocket to a smaller sprocket
You can vary the lever stroke to shift the desired number of gears,
so that to shift by one gear only, move the lever to the (1) position,
and to shift by two gears at one time, move the lever to the (2)
position. A maximum two-gear shift can be made in this manner.

* If the rear derailleur moves to a large degree, such as in
bicycles with rear suspension, it is recommended that you
replace the cap with the
Derailleur side
accessory aluminum cap.

Installation of the chain

For the best SIS performance, periodically lubricate all
power-transmission parts.
This service instruction explains how to use and maintain the
Shimano bicycle parts which have been used on your new bicycle.
For any questions regarding your bicycle or other matters which
are not related to Shimano parts, please contact the place of
purchase or the bicycle manufacturer.

A'
Largest
sprocket

Chain

These service instructions are
printed on recycled paper.

Largest
chainring

Connect the cable to the rear derailleur and,
after taking up the initial slack in the cable,
re-secure to the rear derailleur as shown in
the illustration.

RD-M970

When cutting the outer casing, cut the opposite end to the end
with the marking. After cutting the outer
casing, make the end round so that the
inside of the hole has a uniform diameter.

Rear derailleur
Add 2 links (with the chain on both the largest
sprocket and the largest chainring)

Tightening torque :
5 - 7 N·m {44 - 60 in. lbs.}

One Holland, Irvine, California 92618, U.S.A. Phone: +1-949-951-5003

Pull

Industrieweg 24, 8071 CT Nunspeet, The Netherlands Phone: +31-341-272222
3-77 Oimatsu-cho Sakai-ku, Sakai, Osaka 590-8577, Japan
Please note: specifications are subject to change for improvement without notice. (English)
© Jul. 2006 by Shimano Inc. XBC SZK Printed in Japan.

SI-6LN0B-002-00

General Safety Information

Specifications

Chain length on bicycles
with rear suspension

Rear Derailleur

WARNING
• The ST-M975 / ST-M970 DUAL CONTROL lever is used for both gear shifting and braking operations.
Make sure that you fully understand and are accustomed to the gear shifting and braking operations for your bicycle. Refer to
the illustration for the method of operation.
• If the internal unit of the DUAL CONTROL lever becomes damaged, the lever will move down from the normal lever position,
and it may move to a position where braking is difficult to carry out. If this happens, you should stop riding the bicycle
immediately.
• Check that the wheels are fastened securely before riding the bicycle. If the wheels are loose in any way, they may come off the
bicycle and serious injury may result.
• Use neutral detergent to clean the chain. Do not use alkali-based or acid based detergent such as rust cleaners as it may result
in damage and/or failure of the chain.
• Use the reinforced connecting pin only for connecting the narrow type of chain.
• There are two different types of reinforced connecting
Reinforced
pins available. Be sure to check the table before
Chain
Chain tool
connecting pin
selecting which pin to use. If connecting pins other
9-speed super narrow
than reinforced connecting pins are used, or if a
TL-CN32 / TL-CN27
chain such as
Silver
reinforced connecting pin or tool which is not suitable
6.5mm
CN-7701 / CN-HG93
for the type of chain is used, sufficient connection force
8/
7/
6-speed
narrow
may not be obtained, which could cause the chain to
TL-CN32 / TL-CN27
chain such as
Black
break or fall off.
7.1mm
CN-HG50 / CN-HG40
• If it is necessary to adjust the length of the chain due
Reinforced Connecting Pin
to a change in the number of sprocket teeth, make the cut at some other place than the place
where the chain has been joined using a reinforced connecting pin or an end pin. The chain will
be damaged if it is cut at a place where it has been joined with a reinforced connecting pin or an
end pin.
• Check that the tension of the chain is correct and that the chain is not damaged. If the tension is
End Pin
Link Pin
too weak or the chain is damaged, the chain should be replaced. If this is not done, the chain
may break and cause serious injury.
• Use a front chainwheel which is compatible with 9-speed chains in conjunction with Shimano CN-7701, CN-HG93 and CNHG73 chains. If a chainwheel for an 8-speed chain or less is used, front chainwheel gear shifting problems may occur, or the
chain pins might fall out, causing the chain to break.
• Obtain and read the service instructions carefully prior to installing the parts. Loose, worn or damaged parts may cause the
bicycle to fall over and serious injury may occur as a result. We strongly recommend only using genuine Shimano replacement
parts.
• Obtain and read the service instructions carefully prior to installing the parts. If adjustments are not carried out correctly, the
chain may come off and this may cause you to fall off the bicycle which could result in serious injury.
• Read these Technical Service Instructions carefully, and keep them in a safe place for later reference.

Model number

The length of A will vary depending on the movement of the rear
suspension. Because of this, an excessive load may be placed on
the drive system if the chain length is too short. Set the length of
the chain by adding two links to the chain when the rear suspension
is at a position where dimension "A" is longest and the chain is on
the largest sprocket and the largest chainring. If the amount of
movement of the rear suspension is large, the slack in the chain
may not be taken up properly when the chain is on the smallest
chainring and smallest sprocket.

RD-M970

Type

SGS

Gears

Total capacity

43T

33T

Largest sprocket

34T

Smallest sprocket

11T

Front chainwheel tooth difference

22T

Cassette sprocket tooth combination
Model number

Freehub

Group name

Gears

Tooth combination

11, 12, 14, 16, 18, 21, 24, 28, 32T

Gears

12, 14, 16, 18, 20, 23, 26, 30, 34T

No. of spoke holes

11, 13, 15, 17, 20, 23, 26, 30, 34T

CS-M970

Model number

FH-M975 / FH-M970

ag - 18T

ag -15

The lever always returns to the initial position when it is released
after shifting. When operating the lever, always be sure to turn the
crank arm at the same time.

Lever initial position

Add 2 links (with the chain on
both the largest sprocket and
the largest chainring)

It is recommended that you adjust the grip widths of the levers to
the most comfortable widths for gear shifting and braking.

1st joint

Approx.
2 mm

When installing the components to carbon
frame/handle bar surfaces, verify with the
manufacturer of the carbon frame/parts for
their recommendation on tightening torque
in order to prevent over tightening that can
cause damage to the carbon material
and/or under tightening that can cause lack
of fixing strength for the components.

ag
-1

To shift from a small sprocket to a larger sprocket
(MULTI RELEASE )
You can vary the lever stroke to shift the desired number of gears,
so that to shift by one gear only, move the lever to the (1) position,
and to shift by two gears at one time, move the lever to the (2)
position. A maximum two-gear shift can be made in this manner.

Install the chain with the Pro-Set
alignment block still attached.
After installing, remove the Pro-Set
alignment block.
Turn the crank arm to set the
derailleur to the low position.

Becomes
narrower

SH
IM

Becomes
narrower

Low adjustment
screw

Auxiliary release lever
Becomes
wider

Installation of the rear derailleur
5 mm Allen key

B-tension
adjustment screw

Bracket spindle Tightening torque :
8 - 10 N·m {70 - 86 in. lbs.}

O
AN

HYPERGL I DE - C

SIS-SP41

Rear derailleur

RD-M970

For installation of the HG
sprockets, use the special tool
(TL-LR15) to tighten the lock
ring.

Lock ring

11
T

12T

Tightening torque:
30 - 50 N·m {261 - 434 in. lbs.}
Lock ring spacer

Type
Freehub
Gears
Cassette sprocket
Chain
Bottom bracket guide

Wide part

CS-M970 (bd)

Sprocket spacer

Lock ring spacer

Lock ring

SGS / GS
FH-M975 / FH-M970

TL-LR15

Disassembly

Adjustment bolt

Turn the cable adjustment bolt
clockwise to tighten it until the
chain returns to the 2nd sprocket.
* Turn the adjustment bolt together
with the outer casing adjustment
barrel cover.

Turn the cable adjustment bolt
counterclockwise to loosen it until
the chain touches a sprocket and
generates noise.
* Turn the adjustment bolt together with
the outer casing adjustment barrel
cover.

The best setting is when the cable adjustment bolt is tightened
(turned clockwise) until noise occurs without lever being
operated, and then loosened (turned counterclockwise) 90 - 180
degrees from that point.

Operate the lever eight times or more
to set the lever to the lowest position.
Then remove the inner hole cover and
connect the inner cable.

Operate lever to change gears, and check that no noise occurs
in any of the gear positions.
For the best SIS performance, periodically lubricate all
power-transmission parts.

Inner hole cover

Tool
(TL-SR21)

Inner cable

Inner hole cover

■ Read these Service Instructions in conjunction with the
Service Instructions for the FH-M975/M970.

Install the inner hole cover by turning it as
shown in the illustration until it stops.
Do not turn it any further than this, otherwise
it may damage the thread on the cover.

This service instruction explains how to use and maintain the
Shimano bicycle parts which have been used on your new bicycle.
For any questions regarding your bicycle or other matters which
are not related to Shimano parts, please contact the place of
purchase or the bicycle manufacturer.

Tightening torque :
0.3 - 0.5 N·m {3 - 4 in. lbs.}

Connect the inner cable to
the derailleur as shown in
the illustration.

Note: Be sure that the cable is
securely in the groove.
Groove

One Holland, Irvine, California 92618, U.S.A. Phone: +1-949-951-5003
Industrieweg 24, 8071 CT Nunspeet, The Netherlands Phone: +31-341-272222

CS-M970
CN-7701
SM-SP17 / SM-BT17

To replace the HG sprockets,
use the special tool (TL-LR15)
and TL-SR21 to remove the
lock ring.

The groove is
wide at one
place only.
ac -14T

When no
noise is
heard at all

Best setting

Guide pulley

Outer casing

Top adjustment
screw

Lock ring

XTR

When changing
to 3rd

2. Top adjustment

When installing, be careful not to let the B-tension adjustment screw
come into contact with the dropout tab, otherwise deformation may result.
Do not remove the Pro-Set alignment block at this time.

ST-M975 / ST-M970

Push lever while turning the crank arm to move the derailleur to
the largest sprocket. Then operate lever once to move the
derailleur to the 2nd-gear sprocket. After this, operate lever just
as far as the extent of play, and then turn the crank arm.

Adjustment bolt

ST-M970

CS-M970 (ba)

Aluminum cap

Guide pulley

In order to realize the best performance, we recommend that the following combination be used.
DUAL CONTROL lever

Rubber shield

5. SIS Adjustment

Largest
sprocket

Series

Sealed cap with tongue

Pro-Set alignment block

Lever initial position

Installation of the sprockets

Rubber shield

B-tension
adjustment screw

3. Connecting and securing the inner cable

Rear Drive System

Be careful not to bend

Installation of the chain

Dropout tab

SI-6LN0B-002

The sealed cap with
tongue and the rubber
shield should be
installed to the outer
casing stopper of the
frame.

4. How to use the B-tension adjustment screw

Turn the low adjustment screw so that the guide pulley moves to
a position directly in line with
the largest sprocket.

Technical Service Instructions

Outer end cap

The end of the outer casing
which has the aluminum cap
should be at the derailleur side.

1. Low adjustment

For each sprocket, the
surface that has the group
mark should face outward
and be positioned so that
the wider part of each
sprocket and the A part
(where the groove width is
wide) of the freewheel
body are aligned.

Attach the same outer
end cap to the cut end
of the outer casing.

* If the rear derailleur moves to a large degree, such as in
bicycles with rear suspension, it is recommended that you
replace the cap with the
Derailleur side
accessory aluminum cap.

Tightening torque :
6 - 8 N·m {53 - 69 in. lbs.}

Lever end

ST-M975

After cutting the outer casing, make the end round so that the
inside of the hole has a uniform diameter.

4 mm Allen key

Use a handlebar grip with a maximum
outer diameter of 32 mm.

SIS Adjustment
Adjusting the grip width

2 mm Allen key

Cutting the outer casing

Installation of the lever

Operating the levers

Becomes wider

Pull

Tightening torque :
5 - 7 N·m {44 - 60 in. lbs.}

36 / 32

Note

• Do not use the fixing bolt (made from aluminum) for the auxiliary release lever cap to secure the auxiliary release lever.
• If gear shifting operations do not feel smooth, wash the derailleur and lubricate all moving parts.
• If the amount of looseness in the links is so great that adjustment is not possible, you should replace the derailleur.
• You should periodically clean the derailleur and lubricate all moving parts (mechanism and pulleys).
• If gear shifting adjustment cannot be carried out, check the degree of parallelism at the rear end of the bicycle. Also check if the
cable is lubricated and if the outer casing is too long or too short.
• If you hear abnormal noise as a result of looseness in a pulley, you should replace the pulley.
• If the wheel becomes stiff and difficult to turn, you should lubricate it with grease.
• Do not apply any oil to the inside of the hub, otherwise the grease will come out.
• You should periodically wash the sprockets in a neutral detergent and then lubricate them again. In addition, cleaning the chain
with neutral detergent and lubricating it can be a effective way of extending the useful life of the sprockets and the chain.
• If the chain keeps coming off the sprockets during use, replace the sprockets and the chain.
• Adjust the RD-M970 reverse spring type rear derailleur from the low side.
•Use a frame with internal cable routing is strongly discouraged as it has tendencies to impair the SIS shifting
Group marks
function due to its high cable resistance.
• Always be sure to use the sprocket set bearing the same group marks. Never use in combination with a
sprocket bearing a different group mark.
• Use an outer casing which still has some length to spare even when the handlebars are turned all the way
to both sides. Furthermore, check that the shifting lever does not touch the bicycle frame when the
handlebars are turned all the way.
• Make sure that the gear shifting cable and the brake cable do not obstruct each other during braking
operations. If they do obstruct, it may interfere with braking.
Install the cables so that they still have some slack in them even when the handlebars are turned fully in
either direction.
• A special grease is used for the gear shifting cable (SIS-SP41). Do not use DURA-ACE grease or other types of grease,
otherwise they may cause deterioration in gear shifting performance.
• Grease the inner cable and the inside of the outer casing before use to ensure that they slide properly.
• For smooth operation, use the specified outer casing and the bottom bracket cable guide.
• Operation of the levers related to gear shifting should be made only when the front chainwheel is turning.
• If the brake fluid used in the oil disc brakes is of a type which tends to adhere to the plastic parts of the shifting lever, this may
cause the plastic parts to crack or become discolored. Therefore, you should make sure that the brake fluid does not adhere to
these plastic parts.
The mineral oil which is used in SHIMANO disc brakes does not cause cracking or discoloration if it adheres to plastic parts, but
such parts should be cleaned with alcohol beforehand to prevent foreign particles from adhering.
• Parts are not guaranteed against natural wear or deterioration resulting from normal use.
• For maximum performance we highly recommend Shimano lubricants and maintenance products
• For any questions regarding methods of installation, adjustment, maintenance or operation, please contact a professional
bicycle dealer.

Largest
chainring

These Service Instructions describe the operation method when using the ST-M975 / ST-M970 DUAL CONTROL lever in combination
with the RD-M970 reverse spring-type rear derailleur. If using in combination with the RD-M971 top normal-type derailleur, the
operations will be reversed.

■ Operating the brake
lever

Chain

Largest
sprocket

Connect the cable to the rear derailleur and,
after taking up the initial slack in the cable,
re-secure to the rear derailleur as shown in
the illustration.

CS-M970 (be)

Lock ring spacer

3-77 Oimatsu-cho, Sakai-ku, Sakai-shi, Osaka 590-8577, Japan
Please note: specifications are subject to change for improvement without notice. (English)
© Dec. 2006 by Shimano Inc. XBC SZK Printed in Japan.

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Shimano XTR M970 M972 Rear Derailleur User Manual

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