- Advanced light-action design
- Wide link design for more rigidity and precise shifting
- 43T total capacity
- SmartCage pulley plate
The Shimano Altus M310 7/8-Speed Rear Derailleur features an advanced light-action, long-cage design with Teflon coated bushings. What sets this derailleur apart from others of its kind is its unique 13-tooth upper and 15-tooth lower pulleys that provide a 43-tooth chain wrap capacity, and enable them to rotate with less friction.
