Shimano
The Shimano Alivio RD-M3100-SGS 9V rear derailleur features a compact profile with Shimano's SHADOW design, allowing for aggressive riding with less pace break. It's compatible with 9-speed drivetrains and has a long cage length (SGS) for a total capacity of 45 teeth.
Checked Jul 15, 2026 14:38
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The Shimano Alivio RD-M3100-SGS 9V rear derailleur is designed for road use with a focus on performance and reliability. Its compact profile and SHADOW design enable riders to maintain speed with reduced interruption. This 9-speed compatible derailleur features a long cage length (SGS) and can handle a maximum sprocket size of 36 teeth. With a total capacity of 45 teeth, it offers flexibility for various drivetrain configurations. Part of Shimano's Alivio M3100 series, this rear derailleur is engineered to provide smooth shifting and durable performance.
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