The Shimano FD-M313 Altus Hybrid Front Derailleur. Altus wide link 8-speed compatible dual pull multi-fit front derailleur for recreational off-road use.  Shimano FD-M313 Altus Hybrid Front Derailleur Features Compact conventional 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 degree chainstay to seat tube angle range For outer chainring size from 42 to 48 tooth, total capacity 20 teeth Compatible with 7- or 8-speed drivetrains