The Shimano Tourney RD-TX800-SGS is a highly reliable and budget-friendly 7/8-speed rear derailleur designed for entry-level mountain bikes, hybrid commuters, and casual trekking bicycles. It offers consistent shifting performance, making it ideal for everyday riding.

Technical Specifications Quick-View

• Drivetrain Speed: 7 or 8-Speed
• Cage Length: SGS (Long Cage)
• Mount Type: Direct Attachment (Conventional Hanger Mount)
• Max Low Sprocket: 34 Teeth
• Min Low Sprocket: 28 Teeth
• Top Sprocket Max/Min: 14 Teeth / 11 Teeth
• Total Capacity: 43 Teeth
• Max Front Difference: 20 Teeth

Feature Breakdown

• SGS Long Cage:
  Provides a 43-tooth total capacity, allowing it to wrap enough chain for bikes equipped with a triple front crankset and a wide-range rear cassette.
• Double Servo Design:
  Keeps the derailleur pulley close to each cog during shifts, ensuring smoother, faster, and more precise gear changes across the cassette.
• 13-Tooth Pulleys:
  Features larger 13-tooth tension and guide wheels. These oversized pulleys reduce chain friction, lower operating noise, and extend drivetrain life.
• SIS Index Shifting:
  Fully compatible with Shimano Index Shifting (SIS) technology, offering mechanical, click-into-place accuracy when paired with matching Shimano shifters.
• Direct Mount:
  Attaches directly to a standard rear derailleur hanger on the bicycle frame.

This derailleur is a dependable choice for riders seeking performance and affordability in one package.