The Shimano Tourney RD-TY500 SGS Rear Derailleur is an upgraded, entry-level long-cage rear derailleur designed for 6-speed and 7-speed multi-sport and mountain bike drivetrains. Unlike bracket-mounted models, this "direct attachment" version bolts directly onto a standard, threaded derailleur hanger built into modern bicycle frames.

Key Specifications & Performance Features

• Double Servo-Panta Mechanism:
  Features a Double Servo design that allows the derailleur to track both laterally and horizontally. This ensures the pulley wheel stays close to each cog, enabling faster and more precise index shifting.
• Wheel-Type Cable Guide Pulley:
  Includes a rolling wheel guide at the cable entry point, which reduces friction, eliminates cable outer casing distortion, and ensures super-light shifting action.
• Gearing & Chain Capacity:
  Equipped with a long-cage (SGS) configuration, offering a 43-tooth total capacity and supporting a maximum front tooth difference of 20T.
• Sprocket Compatibility:
  Compatible with a 34T maximum low climbing gear (optimized for Shimano MEGARANGE cassettes) and an 11T minimum top gear.
• Tension Fine-Tuning:
  Features an integrated B-tension adjustment screw to optimize chain gap distance for smooth performance.

This derailleur is a reliable choice for riders looking to enhance their drivetrain with Shimano's trusted engineering.