The new SORA is most attractive and robust 9-speed component ever. SORA is pitched towards sports/fitness cyclists with stylish and clean design. Now with technology adopted from higher level groupsets, both new starters and enthusiasts will feel comfortable sport riding with the features that 9-speed SORA R3000 introduces. Sora R3000 9Speed Gs Rear Derailleur   MODEL NO RD-R3000-GS SERIES SHIMANO SORA R3000 Series Cable adjuster Compatible chain HG 9-speed Direct attachment (Conventional) ? Fluoric coated link bushings 2 Low sprocket_Max. 34T Low sprocket_Min. 28T Max. front difference 20T Pulley_Teeth 11T Pulley cage GS Rear speeds 9 Top-Normal Spring Type Double servo Top sprocket_Max. 14T Top sprocket_Min. 11T Total capacity 43T Riveted Adapter Type Road