Alivio RD-M3100-SGS 9 Spd. July Summer Sale The Butterfly Andrzej Grubba is

The Butterfly Andrzej Grubba is a flexible blade named after one of the world's most dynamic players

Accepts SWAT™ Cage Mount Road or MTB Tool

Thanks to the added Teflon fluoropolymer

Double servo-panta mechanism

or just want to have a little more flexibility about just how much walking around you can do out on your rides

Alivio RD-M3100-SGS 9 Spd. July Summer Sale The Butterfly Andrzej Grubba isThe SHIMANO ALIVIO M3100 rear derailleur delivers a low profile design that lets you ride aggressively with fewer interruptions thanks to its SHIMANO SHADOW design. Low profile design Total capacity: 45T Max. low sprocket: 36T Adjustment barrel