Shimano Tourney TY300 6/7 Speed Rear Derailleur with Dropout Claw Hanger

TX models come with Smart Cage which gives MegaRange compatibility with a shorter derailleur cage Double Servo enables the guide pulley to track the cogs closely while moving front to back, optimizing each shift Designed to keep the rear derailleur guide pulley at an optimum distance from each sprocket for accurate SIS shifting 13t upper and lower pulleys Compatible with HG 6/7/8 speed chains