Shimano tiagra 4703 3x10sp band on front mech10 speed compatible tiagra front derailleur delivers pro features to sport level road riders featuring an extra wide pivot link to increase rigidity while reducing flex for improved shifting response features aluminium links and band to save weight and increase rigidity for road cycles equipped with 10 speed drivetrains plated steel chain cage maximum capacity of 20 teeth for outer rings 50 tootha 2 year warranty is offered with all shimano product