At the heart of the Campagnolo Athena groupset and its key player is the rear derailleur and it is constructed along the 11s engineering lines:
- Ultra-Shift front plate in aluminium. Greater rigidity of the whole, it increases the speed and precision of shifting, reduces play, prolongs the life cycle, and is resistant to corrosion
- Ultra-Shift Parallelogram. Increases rigidity and therefore the speed and precision of shifting, and reduces the weight
- Ultra-Shift bodies in aluminium. Both bodies are aluminium, which translates into greater stress resistance, reduction of play, and increased shifting precision
- Pulleys in special material. A material that reduces the weight and dampens the annoying vibrations of the chain