Shimano Black Shimano Altus M370 SGS rear derailleur 2017

Rear derailleur. 9 speeds. The Altus RD-M370-SGS is a light action MTB rear derailleur for 9-speed shifting systems. It features a low profile concept with double servo-pantograph technology that improves adjustability and resists weather and contamination. The rear derailleur always keeps close to the cassette sprockets, allowing smooth and effortless gear changing. Wide link for durability and precise shifting.