Shimano Tourney TY300-SGS 6/7-Speed Rear Derailleur 34T Long Cage

Shimano Tourney TY300-SGS Rear Derailleur 6/7-Speed | Long Cage | 34T Max | Dropout Claw Hanger

The Shimano Tourney TY300-SGS rear derailleur is built for dependable performance on 6- and 7-speed drivetrains. Featuring SIS Rear Indexing and Double Servo technology, it delivers smooth, precise shifting while maintaining optimal guide pulley alignment across the cassette.

With a long cage design, 43T chain wrap capacity, and compatibility with up to a 34-tooth low cog, the TY300-SGS is ideal for mountain, hybrid, and recreational bikes requiring reliable wide-range shifting.

Specifications

• Model: RD-TY300-SGS

• MPN: ERDTY300B

• UPC: 689228393646

• Speeds: 6 / 7-Speed

• Cage Length: Long (SGS)

• Largest Rear Cog: 34T

• Chain Wrap Capacity: 43T

• Pulley Size: 13T upper / 13T lower

• Mount Type: Dropout Claw Hanger (includes hanger)

• Chain Compatibility: HG 6/7/8-Speed Chains

• Rear Der/Shifter Compatibility: Shimano Mountain

• Color: Black

Key Features & Benefits

• SIS Rear Indexing for smooth, accurate shifting
• Double Servo design keeps guide pulley aligned with sprockets
• Long cage supports wide-range gearing
• Compatible with up to 34T rear cogs
• Includes integrated dropout claw hanger
• Durable construction for everyday riding

Compatibility Notes

✔ Designed for Shimano 6- and 7-speed systems
✔ Compatible with HG 6/7/8-speed chains
✔ Includes claw-style dropout hanger (for frames without replaceable derailleur hangers)
✔ Maximum rear cog: 34T
✔ Total capacity: 43T

Ideal For

• Entry-level mountain bikes

• Hybrid and commuter bikes

• 6- or 7-speed drivetrain replacements

• Bikes without a replaceable derailleur hanger

• Wide-range gearing setups

Why Choose Shimano Tourney?

Shimano Tourney components are trusted worldwide for delivering reliable shifting at an accessible price. The TY300-SGS offers extended gearing capacity, smooth SIS performance, and easy installation—making it a perfect upgrade or replacement for older 6- and 7-speed bikes.

A dependable long-cage rear derailleur built for smooth, accurate shifting across wide-range drivetrains.