The precision and reliability of 12-speed eTap AXS, now at a whole new levelSecure chain management and fast, precise shifting make for a smooth and quiet ride, every timeWireless electronic eTap shift logic for intuitive shifting, easy setup and reliabilityCompatible with both 1x and 2x drivetrains36t cog max derailleur works with 10-28, 10-30, 10-33, and 10-36 cassettesX-SYNC pulleys for increased durability and efficiencyRival12sp36MedBlackeTap AXSUPC/EAN/GTIN: 710845864681