DER SRAM RR RIVAL ETAP AXS D1 12s MED BK 36T MAX BATTERY NOT INCLUDED

The precision and reliability of 12-speed eTap AXS, now at a whole new level
Secure chain management and fast, precise shifting make for a smooth and quiet ride, every time
Wireless electronic eTap shift logic for intuitive shifting, easy setup and reliability
Compatible with both 1x and 2x drivetrains
36t cog max derailleur works with 10-28, 10-30, 10-33, and 10-36 cassettes
X-SYNC pulleys for increased durability and efficiency