SRAM Rear Derailleur S100 Eagle Drivetrain (Mechanical) 12-speed

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Price last checked: 05/06/2026

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SRAM Rear Derailleur S100 Eagle Drivetrain (Mechanical) 12-speed

Sram: SRAM Rear Derailleur S100 Eagle Drivetrain (Mechanical) 12-speed - Replaces SX & Nx Built on a decade of Eagle drivetrain development, the SRAM Eagle S100 rear derailleur delivers reliable shifting performance with updated durability and improved component fitment. The modernised design features an enhanced bushing fitment process to maintain precise operation over long-term use, even under demanding riding conditions. Available with a standard mounting bolt or the innovative Half Mount configuration for UDH-equipped bikes, the derailleur provides improved hanger stability and a cleaner integration similar to Transmission systems. Designed for high-torque applications and consistent shifting performance, the Eagle S100 continues the Eagle promise of accurate, dependable gear changes across varied terrain. Features Updated design built on ten years of Eagle drivetrain development Half Mount option improves derailleur hanger stability on UDH frames Half Mount interface helps protect the hanger from impacts and knocks Proven Drag Spring cage damper for secure chain retention Compatible with Eagle shifters using X-Actuation technology Designed to work with wide-range Eagle cassettes Specifications Speed compatibility: 12-speed Drivetrain configuration: 1x Cable pull ratio: X-Actuation Shift technology: X-Actuation Cage type: Long cage Maximum cassette size: 50T Pulley bearing material: Steel Cage material: Steel Minimum cassette compatibility: 50T

SRAM Rear Derailleur S100 Eagle Drivetrain (Mechanical) 12-speed-

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About: SRAM

SRAM is a leading brand in the cycling industry, known for its high-quality drivetrain components and innovative technology. The company offers a range of cycling products, including shifters, derailleurs, brakes, and chains. SRAM's drivetrain components are widely regarded as some of the best on the market, providing smooth and precise shifting for cyclists of all levels. The brand is also known for its innovative technology, such as its wireless electronic shifting system, which eliminates the need for cables and allows for precise, instant shifting. With a commitment to innovation, performance, and quality, SRAM continues to be a popular choice for cyclists looking for top-of-the-line components for their bikes.

About: Fawkes Cycles

Fawkes Cycles is a UK-based cycling retailer built on a foundation of elite racing experience and a genuine love for the sport. Founded by former professional cyclists Nigel and Mandy—whose achievements include representing Great Britain and winning a world championship—Fawkes Cycles combines expert insight with a strong commitment to customer service. The store offers a wide selection of bikes, parts, and accessories from trusted brands, alongside exclusive deals, discount codes, and convenient services like free UK delivery and click & collect. Whether you're a beginner or a seasoned rider, Fawkes Cycles is a name you can trust for quality, value, and real cycling know-how.