Shimano Tourney TX TY300 6-7-speed MTB rear derailleur - ERDTY300D

The Tourney TX TY300 (ERDTY300D)Shimano is a rear derailleur designed for bikes fitted with a 6- or 7-speed drivetrain . Robust, easy to adjust and affordable, it is an excellent solution for replacing a worn or damaged derailleur on a mountain bike, leisure bike, city bike or children’s bike.

Compatible with the Shimano ’s SISindexing system , the Tourney TY300 ensures smooth and consistent gear changes for everyday use. Its long cage (SGS) design allows it to accommodate a large chain capacity and to work with cassettes or freewheels fitted with a large sprocket of up to 34 teeth, depending on the bike’s configuration.

Its direct attachment to the derailleur hanger makes it easy to fit on compatible frames. Manufactured to Shimano ’s quality standards, it offers excellent wear resistance and reliable performance, even with regular use.

Key features

• Genuine Shimano rear derailleur.
• Compatible with 6- and 7-speed drivetrains.
• Operates with the Shimano SIS Index system.
• Chape Long (SGS) cable length suitable for a wide gear range.
• Compatible with a large sprocket of up to 34 teeth.
• Precise and smooth gear changes.
• Fits directly onto the derailleur hanger.
• Excellent value for money.
• Ideal for mountain bikes, city bikes and leisure bikes.

Technical specifications

• Brand: Shimano
• Series: Tourney TX
• Model: RD-TY300
• Manufacturer’s reference: ERDTY300D
• Type: Mechanical rear derailleur
• Compatible speeds: 6 and 7-speed
• Chape: Long (SGS)
• Mounting: Directly onto derailleur hanger
• Compatible chain: HG / UG 6–7-speed
• Maximum large sprocket: 34 teeth
• Minimum small sprocket: 11 teeth
• Total capacity: 43 teeth
• Colour: Black

FAQ

Which drivetrains is this derailleur compatible with?

The Tourney TY300 Shimano r is designed for 6- and 7-speeddrivetrains (Shimano ) using the SIS indexing system.

Can it replace an older Tourney derailleur?

Yes. It is a suitable replacement for many Shimano Tourney derailleurs compatible with 6- or 7-speed systems, provided the mounting and drivetrain are identical.

Is it suitable for a mountain bike?

Yes. This model is particularly designed for leisure mountain bikes, but is also suitable for city bikes, hybrid bikes and children’s bikes fitted with a 6- or 7-speed drivetrain.

What is the maximum size of the compatible largest sprocket?

The derailleur accommodates a largest sprocket of up to 34 teeth, making it easier to tackle climbs and hilly terrain.

Is this derailleur easy to fit?

Yes. It mounts directly onto a standard derailleur hanger, allowing for quick replacement. You’ll then need to adjust the limit stops, cable tension and B-screw to ensure optimal gear shifting.