Elite road racers demand reliable and precise shifting and with 10 speed compatibility and super lightweight yet durable components the dura ace front derailleur deliverscompatible with dura ace st7900 shifters and fc7900 fc7950 chainsets only for optimum shifting performancethanks to improvements in the cage design outer trim is no longer required allowing the rider to focus on racinglightweight nickel plated forged alloy chain cage reduces weight and increases rigidity whilst resisting abras