Acera M3000 triple front derailleur top swing, dual-pull, 9-speed.Key Features:Acera wide link 9-speed compatible dual pull multi-fit triple front derailleur for recreational off-road use,Compact top swing design,Low-friction wide linkage reduces shifting effort and increases rigidity,Dual pull design allows it to be used with top or bottom cable routing,Multi clamp band is compatible with all frame dimensions,Designed for hybrid bike fitment with 63-66/66-69 degree chainstay to seat tube angle range,For outer chainring 40 tooth,Compatible with 9-speed drivetrains,Designed for 50 mm chain line only.