FEATURES:

Of the Shimano Tourney RD-TY300 6/7s Rear Derailleur Compatible chain - HG-UG 7/6-speed slow sprocket Max - 34T Low sprocket Min - 28TMax. front difference - 20T Pulley Teeth - 13/13T Pulley Cage - SGS Rear Speeds - 7/6Top Normal Spring Type - Double servo Top Sprocket Max - 14T Top Sprocket Min - 11T Totaly capacity - 43T Riveted Adapter Type - BMX-Track, Road.