Wide Link Design 105 Triple Front Derailleur For Increased Rigidity & enhanced Shifting Response For Use With 105 St-5703 Or Ultegra St-6700 Shifters Only For Optimum Shifting Performance Wide Inner Link Increased Rigidity & Takes Front Shifting Performance To A New Level, Especially Under Heavy Load For 10-Speed Drivetrains Light Action Spring Reduces Effort Required To Actuate Shifts Maximum Capacity Of 22 Teeth With 52 Tooth Outer The Aluminium Parts Are Coated To Resist Corrosion & Maintain Their Great Looks