The Shimano FD-R7000 front derailleur utilizes the innovative link construction first introduced with Dura Ace R9100 for easy setup and fine-tuning adjustments without the need for specialty tools. Its new construction matches the force curve of the hand more naturally to reduce effort at the end of shifting and allows for more flexible cable routing design. The derailleur components are redesigned for disc-specific frames, accommodating a wider gear pitch without sacrificing shifting performance. Material: base: aluminum chain guide: steel