The SHIMANO 105 12-speed rear derailleur combines the smooth and stable shifting that is a staple of SHIMANO SHADOW RD design with direct mount compatibility and a wider gear range capacity.
Speed: 12-speed mechanical shifting.
Weight: Approximately 249 grams.
Total Capacity: 41T (handles a maximum front chainring difference of 16T).
Cassette Compatibility: Supports a maximum low sprocket of 36T and a minimum low sprocket of 34T. The top sprocket range is strictly 11T.
Construction: Features an aluminum outer and inner cage with fiberglass-reinforced plastic (GFRP) and stainless steel components.
Pulleys: 11-tooth guide and tension pulleys.