Shimano SL-SY20A Service Instructions

Brand: Shimano

Model: SL-SY20A

Type: Service Instructions

Shimano SL-SY20A is a shifting lever designed for use with 7 or 6-speed SIS rear derailleurs. It is compatible with handlebars with a diameter of 21.7 mm and down tubes with a diameter of 28.6 mm. The lever features a friction mode for the front derailleur and SIS mode for the rear derailleur, allowing for precise and smooth gear shifting. It is recommended to use Shimano lubricants and maintenance products for optimal performance.

SL-SY20 / SL-SY20A

SIS

RD-TY18

MF-TZ20 / MF-TZ21

CN-UG51

Shifting lever

Outer casing

Rear derailleur

Multiple Freewheel

Chain

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

used.

Shifting lever

SL-SY20

Installation of the shifting lever

Install by referring to the illustration below.

General Safety Information

Technical Service Instructions

SI-6D30A-002

Front

Rear

Specifications

SL-SY20

Installation position

Friction (Non SIS)

SIS 7-gears / SIS 6-gears

Handle stem Ø 21.7 mm

Down tube Ø 28.6 mm

SI-6D30A-002-00

• 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.

• Read these Technical Service Instructions carefully, and keep them in a safe place for later

reference.

Note

• Grease the inner cable and the inside of the outer casing before use to ensure that they slide

properly.

• Because the high cable resistance of a frame with internal cable routing would impair the SIS

function, this type of frame should not be used.

• Operation of the levers related to gear shifting should be made only when the front chainwheel is

turning.

• 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.

• 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.

WARNING

* Service Instructions in further languages are available at : http://si.shimano.com

Please note: specifications are subject to change for improvement without notice. (English)

DO NOT DISASSEMBLE

the shifting lever.

Tightening torque:

2.5 Nm {22 in. lbs.}

SL-SY20A-FCAI

SL-SY20A-BCAI

SL-SY20A-S

SL-SY20-S

Lever unit

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

High Tech Campus 92, 5656 AG Eindhoven, The Netherlands Phone: +31-402-612222

3-77 Oimatsu-cho, Sakai-ku, Sakai-shi, Osaka 590-8577, Japan

Tightening torque:

2.5 Nm {22 in. lbs.}

Tightening torque:

2.5 Nm {22 in. lbs.}

Shimano SL-SY20A Service Instructions

Shimano SL-SY20A Service Instructions

Shimano SL-SY20A Service Instructions

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