The Shimano Alivio M3100 9 speed rear derailleur delivers a low profile design that lets you ride aggressively with fewer interruptions thanks to its Shimano Shadow design chain stabiliser system.. Wide Range Gearing
. Smooth, silent performance
. Shimano Shadow Design: chain stabiliser system
. Low-profile design
. Adjustment barrel: keep cable tension just right, making gear adjustment simple

Specifications
. Model No: RD-M3100-SGS
. Series: Shimano Alivio M3100 Series
. Total capacity: 45T
. Max. low sprocket: 36T