The SHIMANO Black ERDM3100SGS Alivio Alivio M3100 rear derailleur is a high-quality component designed for 9-speed bikes. With its sleek black finish and Shadow design, this rear derailleur not only looks great but also performs at a top level. The SGS long cage design provides a wide gear range, making it suitable for a variety of riding styles and terrains.

The Alivio M3100 rear derailleur is part of SHIMANO's Alivio groupset, known for its durability and reliability. This rear derailleur is no exception, with its sturdy construction and precision engineering. It is designed to withstand the rigors of off-road riding and provide smooth and accurate shifting.

The Shadow design of this rear derailleur means that it sits closer to the frame, reducing the risk of damage from rocks, roots, and other obstacles on the trail. This also helps to improve the overall aesthetics of the bike.

With 9-speed compatibility, this rear derailleur is suitable for a wide range of bikes and can handle a variety of terrain and riding styles. Whether you're a beginner or an experienced rider, the SHIMANO Black ERDM3100SGS Alivio Alivio M3100 rear derailleur is a reliable and high-performing choice for your bike.