Shimano 105 FD-R7100-BL Front Derailleur - 12-Speed Double 34.9mm Band Clamp Down-Swing Down-Pull 52t MaxShimano 105 FD R7100 BL Front Derailleur 12 Speed Double 34. 9mm Band Clamp Down Swing Down Pull 52t Max. The Shimano 105 FD R7100 series of 12 speed front derailleurs feature light front shifting smooth and natural shift action and Shimano toggle link construction with an optimized cage design that is seamlessly compatible with disc brake road bikes. Light front shifting operation with smooth and natural shift action Toggle Link construction is light