The Shimano Acera M390 Front Derailleur is perfect for that budget-conscious mountain build or if you simply need a quick replacement to get your trusty bike back on the trail. The Acera's multi-clamp attachment works with 28.6, 31.8, and 34.9 seat tubes and bottom and top pull compatibility ensures that the M390 works with most cable routing options. The trusted Shimano name provides confident shifting, reliability, and durability. The Acera might not be the highest ranking performer in Shimano's range, but it still boldly lives up to Shimano's industry leading standards. FEATURES: Chain Compatibility: 3/32" Crank-FD Type: Mountain Triple Derailleur Capacity: 22 FD/Shifter Compatibility: Mountain Triple Front Derailleur Cable Pull: Bottom, Top Front Derailleur Clamp: Multi-clamp 28.6 (1-1/8") , 31.8 (1-1/4") , 34.9 (1-3/8") Front Derailleur Style: Topswing Max Ring (teeth): 48 teeth 47.5/50mm Chainline 3x9 speed compatible Chrome plated cage