This Athena front derailleur benefits from the Ultra-Shift 11-speed geometry of the cage, meaning the chain can move between the gears of the crankset with the maximum speed and precision in any situation, even when chain crossing is extreme or under stress. This derailleur is compatible with both standard double and compact chainsets.**Technical Specifications:*** Compatible with standard double (39/53T) and compact chainsets (34/50T)* Maximum outer chainring size 54T and minimum inner chainring size 34T* Maximum capacity 16T difference* M-Brace front derailleur body* Ultra-Shift design outer cage with M-Brace front body - for high stiffness as well as fast and precise shifting* Z-Shape inner cage adds stiffness and gives more space for chain crossover * Chrome-plated nickel fork* Special surface treatment and anti-friction insert prolongs the life of the component* Weight: 92g (B/O)