RD-M5100 11-Speed Rear Derailleur

Shimano RD-M5100 11-Speed Rear Derailleur

The Shimano RD-M5100 is a durable and trail-ready 1x11-speed rear derailleur built for modern mountain bike drivetrains. Featuring Shimano SHADOW RD+ technology, it delivers stable shifting, better chain retention, and quieter performance across rough terrain.

Its low-profile design helps protect the derailleur from rocks and trail impacts, while the integrated chain stabilizer reduces chain slap, drop, and noise for a smoother and more controlled ride. With compatibility for up to a 51T low sprocket and a larger 13T pulley, it is ideal for wide-range MTB setups.

Highlights

• 1x11-speed rear derailleur
• Shimano SHADOW RD+ chain stabilization system
• Stable drivetrain performance on rough trails
• Low-profile design helps avoid rock damage
• Chain stabilizer reduces chain drop, slap, and noise
• Quiet drivetrain in all gear positions
• Reduced derailleur and chain tension in low gear
• Larger 13T pulley for smoother drivetrain operation
• Direct mount MTB attachment (Shadow+)

Specs

• Model: RD-M5100
• Speed: 1x11-Speed
• Mount Type: Direct Attachment (Shadow+)
• Min Top Sprocket: 11T
• Max Low Sprocket: 51T
• Pulley Size: 13T
• Use: Mountain Bike
• Brand: Shimano