Acera RD-M3020-SGS Rear Derailleur - 7/8 Speed, Long Cage, Black drop bar-right Multisport GPS watch with a

Multisport GPS watch with a large 1

Accepts tires up to 28mm wide

ADVENT X allows you to find the right gear even in challenging conditions

No side seams and subtly articulated sleeves mean no awkward bunching

Acera RD-M3020-SGS Rear Derailleur - 7/8 Speed, Long Cage, Black drop bar-right Multisport GPS watch with aThe Shimano Acera RD M3020 rear derailleur features Double Servo technology to provide smooth, precise shifting and helps you ride challenging terrain with fewer interruptions. Double Servo mechanism enables the rear derailleur to move in an optimum path Versatile performance and wide compatibility SGS Long cage