• New Shimano XTR M9100 GS Cage 1x12-Speed MTB Rear Derailleur and Made in Japan Quality. Takes a 10T-45T cassette. Out of box.
• Use with single cranks and 12-speed systems.
• Shadow low profile design and adjustable crank.
• 13T Sealed bearing pulley wheels for less friction and noise.
• Clean, tight, no rust, straight, strong springs and mint cosmetic & mechanical condition.
• 12-speed index and friction shifting.
• 242 grams/8.4oz.
• RD852.