SHIMANO FD-6700-G Ultegra Front Derailleur 2x10 Wider outer and inner link with dual pivots for increased strength and rigidity, and eliminates the need to manually trim the outer chainring -- no more chain rub in the big-big combination! DUAL SIS front indexed shifting with optimized spring tension reduces the shifting effort required to move between chainrings -- the result is featherlight downshifts and smoother upshifts 10% less spring tension than Shimano FD-6600 Front Derailleur Smooth shifting under heavy load at each rear position Forged aluminum construction lowers weight without sacrificing durability