Reddit reviews SHIMANO FD-5700 105 Double Front Derailleur (31.8/28.6, Black)

Improved chain guide shape delivers smooth shifting at each rear position, even under heavy loadStiffer, wide inner link design with two pivots increases strength, 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 upshiftsForged aluminum construction lowers weight without sacrificing durabilityUse with Shimano Dual Control Levers for both small and big ring trim