1E-----Shimano Tiagra FD-4703 Front DerailleursCompatible only with ST-4703 or SL-4703 shiftersAluminum links and clamp band to save weight and increase rigidityExtra wide pivot link increases rigidity while reducing flex for improved shifting responsePlated steel chain cage45mm chain line50t maximum outer ring and 20t capacitySee Tech link below for compatibility infoItem SpecificationsDrivetrain Speeds10Double or TripleTripleDerailleur Capacity20Front Der/Shifter CompatibilityShimano RoadFront Derailleur Cable PullBottom PullFront Derailleur ClampBraze-onFront Derailleur StyleTraditionalMax Ring (teeth)50 ----1909943(436-438)7/19/25 80921(20:8/26:ari---p.o.#72621--10:8/10:ari