The Shimano Acera rear derailleur RD-M302-8 with double servo technology impresses with smooth and precise shifting performance. The long cage gives you a large gear range. Even in demanding terrain, the SHIMANO ACERA M3020-8 rear derailleur with double servo technology guarantees uninterrupted riding. Features: - double servo construction - Direct Mount - total capacity: 45 teeth - long cage SGS - large sprocket min. max.: 30, 40 teeth - small sprocket min. max.: 11, 12 teeth