Shimano Alivio RD-M3100 Rear Derailleur - 9-Speed, Long Cage

The Shimano Alivio RD-M3100 Rear Derailleur features Shadow RD technology to keep the derailleur safe from trail obstacles.

• Super low profile Shadow RD technology

• Largest Cog: 36
• Rear Derailleur Mount Type: Shimano Rear Direct Mount , 10x1 Standard
• Chain Wrap Capacity (teeth): 45
• Cage Length: Long
• Rear Der/Shifter Compatibility: Shimano Mountain
• Drivetrain Speeds: 9