Precise, quick-shifting 12-speed road rear derailleur 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. The bike boasts features such as stable shifting performance, SHIMANO SHADOW RD technology, a wider gear range capacity with a maximum low sprocket of 36T, and direct mount compatibility. Shimano 12-speed 105 wide link rear road bike derailleur Specification: Wide Link design increases rigidity and shifting performance Super stiff for fast and accurate changes across the cassette Large 11 tooth pulleys increase service life and reduce noise Super light shift action Compatible with 12-speed drivetrains Minimum low sprocket 34T, maximum low sprocket 36T with double chainset Maximum front difference 16T, total capacity 41T Average weight 249 grams Click here for the Shimano 105 FD-R7100 12-Speed Front Derailleur Genuine, brand new, boxed Shimano product - Biketart are an official UK Shimano stockist.