The SHIMANO ALTUS M310-Smart rear derailleur has a Wide Link design for increased rigidity and precise shifting.

Key points

• Wide Link design for more rigidity and precise shifting
• Advanced light action
• 13/13T pulley (RD-M360)
• MegaPulley (RD-M310) 
• Oversize 15-teeth tensioner and 13-teeth guide pulleys reduce noise and wear
• SMART CAGE pulley plate (RD-M310)
• Total capacity: 43T
• 8/7 speed