Shimano ultegra cx70 2x10sp band on front mechthe 10 speed cx70 cyclo cross double front derailleur is for use with shimano 10 speed road sti shifters only for optimum shifting performance featureslight spring tension provides a feather light down shift and smooth shifter strokewide inner link increased rigidity and takes front shifting performance to a new level especially under heavy loadthe forged wide link cradles the axle pivot at both ends providing a smooth shifting swingoptimised chain