Shimano Deore XT RD-M8250-GS Di2 Wireless Rear Derailleur - 12-Speed, Medium Cage, Shadow ES, Black/Gray Black/Gray EA Rear Derailleur

IRDM8250GSB Shimano Shimano Deore XT RD-M8250-GS Di2 Wireless Rear Derailleur - 12-Speed, Medium Cage, Shadow ES, Black/Gray Rear Derailleur EA Black/Gray Largest Cog 45 Rear Der/Shifter Compatibility Shimano Mountain Di2 Rear Derailleur Mount Type 10x1 Standard Rear Derailleur Mount Type Shimano Rear Direct Mount Drivetrain Speeds 12 Chain Wrap Capacity (teeth) 36 Cage Length Medium Color Black/Gray