The Shimano Deore XT M8130 LINKGLIDE 11-speed Rear Derailleur with SHADOW+ technology delivers smooth and decisive shifting. Roomy chain clearance and stability over rough mountain terrains reduce chain slap and droppage. Designed to integrate with LINKGLIDE cassettes Rear derailleur stabilizer reduces chain slap and improves chain stability Low-profile design is optimized for rough terrain TECH SPECS Largest Cog - 50 Color - Black Rear Derailleur Mount Type - Shimano Rear Direct Mount Drivetrain Speeds - 11 Designed for ebike - Yes Chain Wrap Capacity (teeth) - 39 Cage Length - Medium