Shimano Deore 9 speed Rear Derailleur - SGS - Brand New

This does not come with retail box

The Shimano Deore RD-M591 is a 9-speed long cage (SGS) rear derailleur designed for mountain biking, featuring a 45T total capacity and compatibility with up to 34T-36T cassettes. It is a durable, alloy/steel, top-normal derailleur designed for 3x9 or 2x9 drivetrains.

Key Specifications:

Drivetrain Speeds: 9-speed

Cage Length: Long Cage (SGS)

Maximum Cog: 34T (officially), 36T (often compatible)

Minimum Cog: 11T

Total Capacity: 45T

Max Front Difference: 22T

Weight: ~292–299g

Color: Available in Black or Silver

Compatibility: Shimano Mountain 9-speed shifters and HG chains