Engineered for tough trail days, the Shimano DEORE XT M8250 12-speed mid-cage derailleur delivers outstanding durability and precise shifting. Built for compact 9-45T cassettes, it’s the ideal match for trail riders who want smooth performance and fewer grams. Wireless Di2 shifting, automatic impact recovery, and added ground clearance combine to create a rear derailleur that’s built to take hits and keep on riding. Features: Robust Design: A wide link structure and skid-plate protection enhance toughness and longevity. RD Protection Function: Automatically resets after impact to maintain performance. Shimano Shadow ES: Next-gen chain stability in a slimmer, stronger package. Wireless Precision: Lightning-fast wireless Di2 shifting with a 500% or 510% gear range. Protected Battery: Battery sits safely inside, shielded from trail abuse. Covered Pulleys/Cage: Debris-resistant pulleys help prevent drivetrain clogs. Specs: Medium Cage Long Cage Compatibility Medium Cage Model: XT M8250 Model ID: RD-M8250-GS Max Tooth: 45t Drive Config: 1x Mount Interface: Derailleur Hanger Shift Technology: Wireless Communication Protocol: Di2 Weight: 444g Long Cage Model: XT M8250 Model ID: RD-M8250-SGS Max Tooth: 51t Drive Config: 1x Mount Interface: Derailleur Hanger Shift Technology: Wireless Communication Protocol: Di2 Weight: 446g Compatibility The Shimano XT M8250 Di2 Rear Derailleur is backward compatible with previous generation Shimano 12-speed chains and cassettes. Compatible models include: XTR M9100 and M9200, Deore XT M8100, SLX M7100, and Deore M6100. The XT M8250 Rear Derailleur is compatible with the following: Frame: Modern framesets via a derailleur hanger, including the Universal Derailleur Hanger (UDH) Cassette: 9-45t, 10-45t (Medium Cage - GS) 10-51t (Long Cage - SGS) Shifter: XT M8250 Chain: 12-speed HG: XTR M9100 , Deore XT M8100 , SLX M7100 , Deore M6100 Battery: BT-DN320