The Shimano Alivio M3100 3×9-speed front derailleur uses Shimano’s new Side Swing for enhanced cable routing, light action, and smooth operation. The new design provides extra wide range for triple front chainring cranksets and increases clearance for large wheels and short chain stays.
Features:
Designed for front triple chainring set-ups
Smooth and quiet front shifting in all conditions
More powerful outward shifting
Extra wide range with capacity up to 40T outer ring