The new 10-speed XTR rear derailleur sees a re-engineered architecture that provides a smooth, linear feel at the shifter and is remarkably stable despite suspension movement, trail chatter or inevitable cable contamination. Model Number: RD-M980 Series: XTR Shifting Action: Top-Normal Mount Type: Direct Attachment Maximum Sprocket: 32-36T Minimum Sprocket: 11T Front Difference: 18T Total Capacity: SGS: 41T GS: 35T * New system design * Advanced Light Action * Carbon outer plate * Shimano Shadow RD