Campagnolo's Chorus Rear Derailleur uses an advanced-parallelogram design that assures precise and quick shifting. The carbon/cold-forged-aluminum construction reduces weight considerably, boosts strength and provides a high-tech look. Plus, the pulleys are made from a special material for quieter drivetrain action.
Largest cog this derailleur can handle: 29 tooth
Not recommended for use with 9- and 10-speed Campagnolo components