Shimano 105 5700 10-Speed 31.8/28.6mm Double Front Derailleur Black

Shimano 105 5700 10-Speed 31.8/28.6mm Double Front Derailleur Black

Improved chain guide shape delivers smooth shifting at each rear position, even under heavy load,Stiffer, 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 ed shifting with optimized spring tension reduces the shifting effort required to move between chainrings - the result is featherlight downshifts and smoother upshifts,Forged aluminum construction lowers weight without sacrificing durability,Use with Shimano Dual Control Levers for both small and big ring trim