Shimano RD-M810 Service Instructions Manual

3. Chain length on bicycles with rear suspension

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.

4. Outer casing length

(1) Loosen the B-tension adjustment screw until it is in the

position shown in the illustration.

(2) Check that there is enough slack in the outer casing. Next,

align the outer casing with the bottom
edge of the outer casing holder at the
rear derailleur and then cut of any excess
length of outer casing.

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

SAINT

SL-M810

SIS-SP41

RD-M810

SS / GS

FH-M810 / FH-M815

9

CS-M770 / CS-HG80 / CS-6500

CN-HG93

SM-SP17 / SM-BT17

Technical Service Instructions SI-5WN0A-001

RD-M810

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

Largest

sprocket

Chain

Largest

chainring

Rear derailleur

Series

RAPIDFIRE (Shifting lever)

Outer casing

Rear derailleur

Type

Freehub

Gears

Cassette sprocket

Chain

Bottom bracket guide

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

Specifications

Model number

Type

Gears

Total capacity

Applicable sprocket combination

Smallest sprocket

Front chainwheel tooth difference

RD-M810

SS

9

17T / 23T*

11-32T / 11-34T / 11-28T / 11-23T / 12-25T

11T

Single

Rear Derailleur

GS

9

31T / 37T*

11T

14T

Installation of the rear derailleur

5 mm Allen key

General Safety Information

WARNING

• Downhill bicycle riding and off-road bicycle riding are inherently dangerous activities. There is a risk

of being involved in an accident that can result in a serious injury or even death. It is strongly
recommended that riders wear protective head and body gear and perform thorough safety checks
of their bicycles before riding. Please remember that you are riding at your own risk and that you
have to consider your experience and your skills very carefully.

• If it is difficult to install the wheel, install the quick release lever on the rotor side.
If doing this, make sure that the quick release lever does not interfere with the rotor and that burns do not
occur.

• 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.

• 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 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 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.

Note

• Depending on the shape of the frame, the rear derailleur may interfere with the chain stay.

• 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 shor t.

• 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.

• 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. 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.

• 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.

• This product is not warranted against damage resulting from use such as jumping while riding or if the
bicycle falls over, except if such malfunctions result from non conforming materials or manufacturing
methods.

• 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.

Chain toolChain

9-speed super narrow

chain such as

CN-7701 / CN-HG93

8- /7- / 6-speed narrow

chain such as

CN-HG50 / CN-HG40

Reinforced

connecting pin

TL-CN32 / TL-CN27

TL-CN32 / TL-CN27

6.5mm

7.1mm

Silver

Black

Reinforced Connecting Pin

End Pin Link Pin

g

a

-

18

T

-

S

H

I

M

A

N

O

H

Y

P

E

R

G

L

I

D

E

C

a

g

-

1

5

T

a

g

-

1

3

T

Group marks

1. Top adjustment

Turn the top adjustment screw to adjust so that
the guide pulley is in line with the outer line of
the smallest sprocket when looking from the rear.

2. Low adjustment

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

SIS Adjustment

Top adjustment

screw

Guide pulley

Pull

Less than 30 mm

Tightening torque :

5 - 7 N·m {44 - 60 in. lbs.}

Groove

Note: Be sure that the cable is

securely in the groove.

Low adjustment

screw

Cutting the outer casing

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

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

Outer end cap

* 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
accessory aluminum cap.

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

Aluminum cap

Derailleur side

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

Rubber shield

Rubber shield

Be careful not to bend

Sealed cap with tongue

5. How to use the B-tension adjustment screw

Mount the chain on the smallest chainring and the largest
sprocket, and turn the crank arm to shift gears. Then turn the B­tension adjustment screw
to adjust so that the guide
pulley does not interfere
with the sprocket but not so
close that it touches the
chain. Next, set the chain
to the smallest sprocket
and repeat the above to
make sure that the pulley
does not touch the
sprocket.

■ Replacing the rear derailleur

Note: When removing the tension pulley in

order to replace the rear derailleur,
remove the E-ring first.

<Checking the distance between the largest sprocket
and the guide pulley>

Set the rear derailleur to the lowest gear position, stop the wheel
from turning, and then check that the distance from the edge of
the guide pulley to the edge of the largest sprocket is within the
range of 5 - 6 mm. Turn the crank arm to shift gears and check
that there is no roughness in the feel. If the number of teeth for
the cassette sprocket is changed, carry out this setting again.

Largest sprocket Smallest sprocket

B-tension

adjustment screw

6. SIS Adjustment

Operate the shifting lever several times to move the chain to the
2nd sprocket. Then, while pressing the lever just enough to take
up the play in the lever, turn the crank arm.

When shifting to
3rd

Tighten the outer casing
adjustment barrel until the
chain returns to the 2nd
sprocket. (clockwise)

Loosen the outer casing
adjustment barrel until the
chain touches the 3rd sprocket
and makes noise. (counter
clockwise)

When no sound
at all is heard

Best setting

The best setting is when the shifting lever is
operated just enough to take up the play and the
chain touches the 3rd sprocket and makes noise.

* Return the lever to its original position (the position where

the lever is at the 2nd sprocket setting and it has been
released) and then turn the crank arm clockwise. If the
chain is touching the 3rd sprocket and making noise, turn the outer
casing adjustment barrel clockwise slightly to tighten it until the noise
stops and the chain runs smoothly.

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.

Note:

The distance between the outer stopper to the outer casing
holder of the rear derailleur may change when the rear
suspension moves, so determine the length of the outer casing at
the point where this length is at its greatest.
When changing the mode converter settings, particularly when
changing the bicycle from mountain to downhill specifications, the
outer casing may become shortened. If this happens, it will affect
the shifting characteristics, so readjust the length of the outer
casing.

Note:

Set the inner cable so that it protrudes by a
length of less than about 30 mm, and then
check that the inner cable does not interfere with
the spokes of the wheel. Stop the wheel from
turning while carrying out this step.

Please note: specifications are subject to change for improvement without notice.(English) © Mar. 2008 by Shimano Inc. XBC SZK Printed in Japan.

One Holland, Irvine, California 92618, U.S.A. Phone: [phone] Industrieweg 24, 8071 CT Nunspeet, The Netherlands Phone: [phone] Oimatsu-cho, Sakai-ku, Sakai-shi, Osaka 590-8577, Japan

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.

Outer casing

Outer casing holder

Guide pulley

Largest sprocket

Outer line of
smallest sprocket

(2)

(1)

E-ring

Tension pulley

Guide pulley / Tension pulley

Tightening torque :

2.45 - 4.9 N·m {21 - 43 in. lbs.}

2 mm Allen key

Mode converter

* is for when the mode converter is used

About the mode converter

This derailleur is compatible with two types of sprockets: All-mountain mode (11-32T/
11-34T) and downhill mode (11-23T/12-25T/11-28T). If using the All-mountain mode
sprockets, you will also need to use the mode converter.

Use the force of your hand to check that the
mode converter can be pressed against the
dropout.

Note: After tensioning the chain, check that

the mode converter can be pressed
against the dropout.

Removing the mode converter

Bicycle type

Mode converter

Applicable sprocket combination

All-Mountain Downhill

X

11-32T / 11-34T

–

11-23T / 12-25T / 11-28T

Outer casing adjustment
barrel

Outer casing adjustment
barrel

Tightening torque :

1 - 1.5 N·m {9 - 13 in. lbs.}

Bracket spindle Tightening torque :

8 - 10 N·m {70 - 86 in. lbs.}

All-mountain mode Downhill mode