Road racing. CX. Gravel. Coffee rides. This derailleur truly does it all and looks good doing it. The D2 features a single cage length that works with any cassette size from 10-28T to 10-36T, in 1x or 2x configurations. Shifts are fast and precise, and the Orbit fluid damper keeps the chain in control, whether the obstacle you’re hitting is a pothole or a root. And the graphics pop just the right amount, to remind you that you have the coolest fully wireless drivetrain out there.   Features Orbit chain management technology keeps the drivetrain quiet and secure. AXS enabled for easy setup, personalization, and reliability. Compatible with both 1x and 2x drivetrains. 36T-max derailleur is compatible with cassettes with big cogs from 28T to 36T. eTap shift logic for intuitive shifting. Large X-SYNC pulleys for increased durability and efficiency.   Specification Speed: 12. Cable pull ratio: n/a. Max Tooth: 36T. Pulley bearings material: Steel. Cage material: Aluminium. Battery NOT included.