Shimano Tourney RD-TY21-B-GS - ERDTY21BGSDL - 6-speed rear derailleur, direct mount, GS cage, SIS INDEX compatible

Shimano Tourney RD-TY21-B-GS 6-speed rear derailleur

The Shimano Tourney RD-TY21-B-GS rear derailleur is designed for Shimano SIS INDEX 6-speed drivetrains. Simple, reliable, and affordable, it ensures smooth gear shifting on bikes equipped with a 6-speed compatible drivetrain.

With its direct mounting, GS cage and compatibility with HG 8, 7 and 6 speed chains, the Shimano Tourney RD-TY21-B-GS - ERDTY21BGSDL rear derailleur is a suitable solution for replacing a worn derailleur or restoring a Shimano Tourney drivetrain.

This black model features an integrated cable adjuster, 11-tooth pulleys, and a capacity suitable for setups with small sprockets up to 28 teeth. It is designed for recreational bikes, city bikes, hybrid bikes, or mountain bikes equipped with a compatible Shimano 6-speed drivetrain.

Design

Direct attachment

The Shimano Tourney RD-TY21-B-GS derailleur uses a direct mount, suitable for frames compatible with this type of mounting.

GS screed

The GS clevis ensures proper chain management on a compatible 6-speed transmission.

Integrated cable adjuster

The cable adjuster allows you to adjust the cable tension to fine-tune gear changes after installation.

Black finish

The black finish offers a discreet and versatile look, easy to integrate on different types of bikes.

Performance

Compatible with SIS INDEX

This derailleur is compatible with Shimano SIS INDEX 6-speed transmissions, for indexed and consistent shifting with compatible controls.

Reliable gear shifting

The RD-TY21-B-GS allows for simple and efficient operation on a Shimano Tourney 6-speed transmission.

Convenient replacement

This model is perfectly suited to replace a worn, damaged or misaligned rear derailleur on a compatible bicycle.

Versatile use

The Shimano Tourney range is suitable for leisure bikes, city bikes, hybrid bikes and entry-level mountain bikes equipped with a compatible drivetrain.

Compatibility

6-speed transmission

The Shimano Tourney RD-TY21-B-GS derailleur is designed for 6-speed rear drivetrains.

Shimano HG chains

It is compatible with Shimano HG 8, 7 and 6 speed chains.

Compatible sprockets

The derailleur accepts a 14-tooth top sprocket and a small sprocket up to 28 teeth, according to the specifications indicated.

Direct mounting

This model is designed for direct mounting onto a compatible frame.

Technical specifications

• Brand: Shimano
• Range: Tourney
• Model: RD-TY21-B-GS
• Shimano part number: ERDTY21BGSDL
• EAN code: 4550170753603
• UPC Code: 192790753607
• Product family: rear derailleur
• Reverse speeds: 6 speeds
• Type: direct fixing
• Chape: GS
• Color: black
• Packaging: individual packaging
• Transmission compatibility: SIS INDEX 6-speed
• Compatible chain: HG 8 / 7 / 6 speed
• Roller: 11 / 11 teeth
• Cable adjuster: yes
• Minimum upper sprocket size: 14 teeth
• Maximum upper sprocket: 14 teeth
• Smallest sprocket: 28 teeth
• Smallest sprocket max.: 28 teeth
• Maximum front difference: 20 teeth

Recommended use

• Replacing a Shimano 6-speed rear derailleur
• Compatible Shimano Tourney drivetrain
• Leisure cycling
• Urban bike
• VTC
• Entry-level mountain bike
• Assembly with Shimano HG 6/7/8 speed chain compatible

Why choose the Shimano Tourney RD-TY21-B-GS rear derailleur?

• Shimano Tourney 6-speed rear derailleur
• Compatible with SIS INDEX transmissions
• Direct attachment
• GS screed
• Compatible with HG 8, 7 and 6 speed chains
• Integrated cable adjuster
• Discreet black finish
• A simple solution to replace a worn rear derailleur
• Genuine Shimano product
• Reference ERDTY21BGSDL