SRAM Apex Eagle D1

Eagle range on a drop bar bike? Now that's a party. The Apex Eagle rear derailleur quietly and quickly shifts across 12-speed Eagle cassettes, while 1x-specific chain retention technology keeps the chain where it needs to be. It's the best of road and mountain bike innovations in one package.
Compatible with 50T and 52T Eagle cassettes
Works with 12-speed mechanical Apex and Eagle shifters
Use with Eagle chain
Roller Bearing Clutch controls chain tension for consistent shifting
X-HORIZON straight parallelogram design limits all movement to the horizontal axis, which makes ghost shifting impossible while also reducing shift force
Cage Lock technology makes for fast wheel changes or chain installation
SRAM Model ID: RD-APX-152-D1