System engineering at its peak. Each of the components magnifies the qualities of the others for an unparalleled level of performance. Optimizing input to maximize output. That's how it achieves supremacy..

Specifications
Ergonomic shifting operation without stress
SHIMANO synchronized shift
Low profile rear derailleur design
SHIMANO SHADOW RD
Race endurance for less damage in crash
Maintains compact and smooth appearance

Mfr Claimed Weight
197g