The Shimano Altus M20009 9 Speed Hybrid Front Derailleur is an Altus wide link 9-speed compatible dual pull multi-fit front derailleur for recreational off-road use. Conventional swing design for positive shifting action. Shimano Altus M20009 9 Speed Hybrid Front Derailleur Features 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 degree chainstay to seat tube angle range For outer chainring size from 44 to 48 tooth, total capacity 22 teeth Compatible with 9-speed drivetrains Designed for 50 mm chain line only