Shimano Deore RD-M592 shadows SGSrear derailleur 9S

Shimano Deore RD-M592 SHADOW SGS rear derailleur

Wide link design: Increases rigidity and service life.
Top Normal return spring: Lends to incredibly intuitive operation when combined with Rapid fire shift levers. The shifting to large gears done by spring tension allows shifting at an exact point, noise reduction, and less strain on gears for durability.

Shimano Shadow rear derailleur with an extra thin profile that reduces the chance to hit any object on the trail. Furthermore, it features a crisp shift feeling and the cable routing has been shortened for faster response.