Shimano SM-CDE80 is a chain device designed to prevent the chain from dropping off the chainring on E-bikes. It is compatible with compact guide type chainrings and can be installed on bikes with rear suspension. The device is easy to install and remove, and it comes with a spacer that allows you to adjust the installation position of the guide. The SM-CDE80 is a reliable and effective way to keep your chain in place, even on rough terrain.
Shimano SM-CDE80 is a chain device designed to prevent the chain from dropping off the chainring on E-bikes. It is compatible with compact guide type chainrings and can be installed on bikes with rear suspension. The device is easy to install and remove, and it comes with a spacer that allows you to adjust the installation position of the guide. The SM-CDE80 is a reliable and effective way to keep your chain in place, even on rough terrain.
Dealer's Manual
ROAD MTB Trekking
City Touring/
Comfort Bike
URBAN SPORT E-BIKE
Chain Device
(English)
CD-EM800
SM-CDE80
SM-CDE70
DM-CDE001-01
2
Contents
Contents ...................................................................................2
IMPORTANT NOTICE ..................................................................3
TO ENSURE SAFETY ...................................................................4
List of tools to be used ............................................................8
Installation/removal ................................................................9
About compatibility ...............................................................................9
Compact guide type ...............................................................................9
Standard guide type ............................................................................15
Maintenance ...........................................................................20
Replacing the guide .............................................................................20
• Compact guide type ............................................................................................................... 20
• Standard guide type ............................................................................................................... 20
Changing the guide installation position with a spacer ...................21
3
IMPORTANT NOTICE
IMPORTANT NOTICE
• This dealer's manual is intended primarily for use by professional bicycle mechanics.
Users who are not professionally trained for bicycle assembly should not attempt to
install the components themselves using the dealer's manuals.
If any part of the information on the manual is unclear to you, do not proceed with the
installation. Instead, contact your place of purchase or a distributor for assistance.
• Make sure to read all manuals included with the product.
• Do not disassemble or modify the product other than as stated in the information
contained in this dealer's manual.
• All manuals and technical documents are accessible online at https://si.shimano.com.
• For consumers who do not have easy access to the internet, please contact a SHIMANO
distributor or any of the SHIMANO offices to obtain a hardcopy of the User's Manual.
• Please observe the appropriate rules and regulations of the country, state or region in
which you conduct your business as a dealer.
For safety, be sure to read this dealer's manual thoroughly before use, and
follow it for correct use.
The following instructions must be observed at all times in order to prevent personal injury
and physical damage to equipment and surroundings.
The instructions are classified according to the degree of danger or damage which may occur
if the product is used incorrectly.
DANGER
Failure to follow the instructions will result in death or serious
injury.
WARNING
Failure to follow the instructions could result in death or
serious injury.
CAUTION
Failure to follow the instructions could cause personal injury or
physical damage to equipment and surroundings.
4
TO ENSURE SAFETY
TO ENSURE SAFETY
WARNING
• Be sure to follow the instructions provided in the manuals when installing the product.
Only use SHIMANO genuine parts. If a component or replacement part is incorrectly
assembled or adjusted, it can lead to component failure and cause the rider to lose
control and crash.
•
Wear approved eye protection while performing maintenance tasks such as
replacing components.
• For information on products not explained in this manual, refer to the manuals provided
with each product and store them so that they can be referenced at any time.
Be sure to also inform users of the following:
• Check that the wheels are fastened securely before riding the bicycle. Otherwise, you
may fall off the bicycle and be seriously injured.
For installation to the bicycle, and maintenance:
• Be sure to remove the battery and charging cable before wiring or attaching parts to the
bicycle. Otherwise, an electric shock may result.
• Clean the chain with an appropriate chain cleaner regularly.
Intervals between maintenance depend on the use and riding circumstances. Never use
alkali based or acid based solvents, such as rust cleaners. If those solvents are used the
chain might break and cause serious injury.
CAUTION
Be sure to also inform users of the following:
• Observe the instructions in the manual for the bicycle in order to ride safely.
• Use the product under the supervision of someone responsible for safety, and only as
instructed. Do not allow anyone (including children) with reduced physical, sensual, or
mental capacity, or those without experience or knowledge, to use the product.
• Do not allow children to play near the product.
• If any malfunction or trouble occurs, consult the place of purchase.
For installation to the bicycle, and maintenance:
• Be careful to keep body parts away from the sharp teeth of chainrings.
5
TO ENSURE SAFETY
NOTICE
Be sure to also inform users of the following:
• For installation and adjustment of the product, consult the place of purchase.
• Handle the components carefully, and avoid subjecting them to strong shock.
• For any questions regarding methods of installation and maintenance, please contact
your place of purchase.
• Products are not guaranteed against natural wear and deterioration from normal use
and aging.
• For maximum performance we highly recommend SHIMANO lubricants and maintenance
products.
The actual product may differ from the illustration because this manual is
intended mainly to explain the procedures for using the product.
Booklet structure
User's manual
SHIMANO STEPS series user's manuals are split among several booklets, as described
below.
The latest manuals are available on our website (https://si.shimano.com).
Name Details
SHIMANO STEPS User's Manual
This is the basic manual for the SHIMANO STEPS series. It
contains the following content.
• SHIMANO STEPS quick guide
• Basic operations when riding
• How to operate assist bicycles that use flat handlebars,
such as city, trekking, or MTB type bicycles
• General troubleshooting
SHIMANO STEPS User's Manual for
Drop Handlebar Bicycles (separate
booklet)
This booklet describes how to operate assist bicycles that
use a drop handlebar and are controlled using dual control
levers. This should be read along with the SHIMANO STEPS
User's Manual.
6
TO ENSURE SAFETY
Name Details
SHIMANO STEPS Special Battery and
Parts User's Manual (separate
booklet)
It contains the following content.
• How to charge and handle the SHIMANO STEPS special
battery
• How to attach and remove the SHIMANO STEPS special
battery to the bicycle
• How to use the satellite system ON/OFF switch and
satellite charging port
• How to read the battery LEDs when charging or during an
error, and how to handle errors
SHIMANO STEPS Cycle Computer
User's Manual
It contains the following content.
• Method for configuring settings via the main body
buttons and switch unit
• Wireless communication method
• Problems and errors/warnings and remedies
Switch Unit User's Manual
This is the assist switch and shifting switch user's manual. It
describes switch unit handling and operations only.
Dealer's Manual
SHIMANO STEPS series dealer's manuals are split among several booklets, as described
below.
The latest manuals are available on our website (https://si.shimano.com).
Name Details
SHIMANO STEPS Dealer's Manual
This is the basic manual for the SHIMANO STEPS series.
• Overall wiring diagram
• Overall flow of operations for installing the SHIMANO
STEPS components to an assist bicycle
• Installation/removal and maintenance of the drive unit
area
• Installation/removal of the speed sensor
SHIMANO STEPS Dealer's Manual for
Drop Handlebar Bicycles (separate
booklet)
It specializes in the following information regarding assist
bicycles that use a drop handlebar and are controlled using
dual control levers. This should be read along with the
SHIMANO STEPS Dealer's Manual.
• Overall wiring diagram
• Cautions to follow when installing the drive unit
SHIMANO STEPS Special Battery and
Parts Dealer's Manual (separate
booklet)
It contains the following content.
• How to install the battery mount
• How to install the satellite system ON/OFF switch and
satellite charging port
7
TO ENSURE SAFETY
Name Details
SHIMANO STEPS Cycle Computer and
Switch Unit Parts Dealer's Manual
It contains the following content.
• Installation and maintenance of the SHIMANO STEPS
special cycle computer, special junction [A] and switch
unit
• How to connect to the PC version of E-TUBE PROJECT
SHIMANO STEPS Chain Device
Dealer's Manual (this document)
This manual describes the installation and maintenance of
the SHIMANO STEPS special chain device.
8
List of tools to be used
List of tools to be used
The following tools are needed for installation/removal, adjustment, and maintenance
purposes.
Tool
3 mm hexagon wrench
4 mm hexagon wrench
9
Installation/removal
About compatibility
Installation/removal
For assist bicycles with rear suspension, make sure in advance that there is no weight applied to
the rear suspension.
NOTICE
• When installing parts on a carbon frame, confirm the recommended tightening torque
with the carbon frame or part manufacturer in order to prevent damage to the carbon
material due to overtightening or inadequate securing of the components due to
insufficient tightening torque.
About compatibility
A chain device for E-BIKE may not be able to be installed, depending on the drive unit. The
chain device that can be installed may also differ, depending on the model of the chainring
unit. For details, check the product lineup on the SHIMANO product website (https://
productinfo.shimano.com/#/lc).
Compact guide type
For models: CD-EM800
1. Refer to the “SHIMANO STEPS Dealer's Manual” to install the
components as indicated below.
(1) Install the drive unit to the frame.
(2) Install the left crank arm to the drive unit.
10
Installation/removal
Compact guide type
2. Temporarily install the chain device's bracket.
Bracket
Bracket mounting screw
(Temporary)
NOTICE
• The above bracket mounting screws are included with the chain device. However,
if the drive unit you are installing to is the DU-EP800, special mounting screws
for magnesium products are required. Make sure to use the mounting screws
included with the drive unit.
3. Install the chainring unit and chain.
Refer to the “SHIMANO STEPS Dealer's Manual.”
Chain
Chainring unit
11
Installation/removal
Compact guide type
TECH TIPS
• If the chainring unit is difficult to install, temporarily remove the guide from the
bracket, install the chainring unit and chain, then temporarily install the guide to
the bracket. (Refer to “Replacing the guide.”)
4. Shift the chain to the smallest rear sprocket.
5. Adjust the height of the guide.
(1) Loosen the guide mounting screw half a turn.
* When the guide mounting screw is loosened, the guide can be moved up and down.
Be careful not to loosen the screw excessively, as this will increase the excess play of
the guide and make position alignment difficult to perform.
(2) Adjust the vertical position of the guide.
12
Installation/removal
Compact guide type
* Set the guide so that the bottom edge of the chain and the bottom edge of the
guide overlap when viewed from the right crank side.
* Do not tighten the guide mounting screw at this time.
Guide mounting screw
(1) (2)
Bottom edge of the
chain
Bottom edge of the
guide
Guide
Guide
6. Adjust the gap between the guide and chain.
Turn the adjuster and adjust until the following conditions are met.
• The gap between the chain and the inside surface of the guide outer side is 0 - 0.5 mm
13
Installation/removal
Compact guide type
• The gap between the guide and adjuster is 3 mm or less
0 - 0.5 mm
Adjuster
Guide
Chain
3 mm or less
Adjuster
NOTICE
• Depending on the frame, the two conditions above may not be met. In this case,
use the spacer included with the product. (Refer to “Changing the guide
installation position with a spacer.”)
7. Secure the guide.
Guide mounting
screw
2 - 3 N·m
NOTICE
• When tightening the guide mounting screw, the adjuster may rotate along with
the screw. Hold the adjuster stable to prevent it from turning while tightening
the guide mounting screw.
14
Installation/removal
Compact guide type
8. Adjust the position of the guide and chain.
• Move the bracket fore and aft from the right side of the crank and align the position of
the top of the chain with the groove on the inside surface of the guide.
• There are two grooves on the inside surface of the guide. Align the upper edge of the
chain with the lower groove for bicycles with rear suspension or with the upper groove
for hardtails.
Groove (for hardtails)
Top edge of the chain
Groove (for bicycles with rear suspension)
15
Installation/removal
Standard guide type
9. Secure the bracket.
This completes the installation process for the chain device.
Refer to the “SHIMANO STEPS Dealer's Manual” to secure the chainring unit and install
the right crank arm.
Bracket mounting screw
3 - 4 N·m
NOTICE
• After installing the chain device, make sure that the top portion of the bracket is
not touching the frame or rear suspension.
• After installing the chain device, turn the crank and make sure that there is no
abnormal noise caused by the chain striking the guide.
• Similarly, make sure that there is no abnormal noise caused by the chain striking
the guide when shifting to the largest sprocket or when the rear suspension is
depressed.
Standard guide type
For models: SM-CDE80 / SM-CDE70
16
Installation/removal
Standard guide type
NOTICE
• For the standard guide type chain device, the shape of the back plate differs
according to the number of teeth of the chainring unit.
For 34T/38T
For 36T
• A back plate is not required for frames with an integrated guide mount. For
details, refer to the manual for the assist bicycle.
1. Refer to the “SHIMANO STEPS Dealer's Manual” to install the
components as indicated below.
(1) Install the drive unit to the frame.
(2) Install the left crank arm to the drive unit.
2. Temporarily install the chain device's back plate.
Axle
Back plate
Back plate mounting screw (M6)
(Temporary)
17
Installation/removal
Standard guide type
NOTICE
• The above mounting screws are included with the chain device, but special
mounting screws for magnesium products are required if the drive unit is the
DU-EP800. Make sure to use the mounting screws included with the drive unit.
3. Install the chainring unit and chain.
Refer to the “SHIMANO STEPS Dealer's Manual.”
Chain
Chainring unit
4. Install the guide.
(1) Select the guide mounting hole according to the number of teeth of the chainring
unit.
18
Installation/removal
Standard guide type
(2) Set the guide to the guide mounting hole on the back plate, and tighten the guide
mounting screw (M5) to temporarily install the guide.
* For frames with an integrated guide mount, temporarily install the guide to the
installation location specified by the bicycle manufacturer.
36T
38T
34T
Guide fixing hole
Guide mounting screw (M5)
(Temporary)
Guide
5. Adjust the gap between the guide and chain.
(1) Shift the chain to the smallest rear sprocket.
(2) Adjust so that there is a gap of 0 - 1 mm between the chain and the rubber band.
• If a back plate is installed, rotate the back plate as shown in the figure, then adjust.
• If the guide is installed directly to the frame, move the guide along the elongated hole
in the installation area, then adjust.
(3) After adjusting, secure the back plate and guide.
This completes the installation process for the chain device. Refer to the “SHIMANO STEPS
Dealer's Manual” to secure the chainring unit and install the right crank arm.
NOTICE
• On bicycles with rear suspension, if the chain and guide make contact at the rear
suspension sag position, adjust the gap between the chain and rubber band with
the chain shifted to the largest sprocket.
19
Installation/removal
Standard guide type
Chain
Rubber band
0 - 1 mm
Guide mounting screw
(M5)
Back plate mounting screw (M6)
4 N·m
3 - 4 N·m
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Shimano SM-CDE80 Dealer's Manual
- Type
- Dealer's Manual
Shimano SM-CDE80 is a chain device designed to prevent the chain from dropping off the chainring on E-bikes. It is compatible with compact guide type chainrings and can be installed on bikes with rear suspension. The device is easy to install and remove, and it comes with a spacer that allows you to adjust the installation position of the guide. The SM-CDE80 is a reliable and effective way to keep your chain in place, even on rough terrain.
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