The Shimano Altus RD-M310 Smart Rear Derailleur is a 7/8-speed MTB derailleur designed for smooth, reliable shifting on entry-level mountain and hybrid bikes. Featuring Shimano’s SMART CAGE design and Wide Link construction, it delivers increased rigidity, reduced flex, and precise gear changes under load.

The derailleur incorporates oversized pulleys (15T tensioner and 13T guide) to reduce chain noise and wear, enhancing drivetrain longevity. Its light-action mechanism ensures effortless shifting across cassettes with low sprockets up to 34T and total capacity of 43T, making it suitable for a wide range of terrain and riding conditions.

Key Features:

• Model: Shimano Altus RD-M310 Smart

• Series: Altus M310

• Speed Compatibility: 7/8-Speed

• Mount Type: Direct attachment (Conventional)

• Technology: SMART CAGE, Wide Link design for rigidity and precision

• Pulley System: Oversize 15T tensioner & 13T guide pulleys

• Total Capacity: 43T

• Max Front Difference: 20T

• Rear Sprocket Range: 11–34T

• Chain Compatibility: HG 6/7/8-speed

• Colors: Black | Silver

• Features: Advanced light-action shifting, reduced noise and wear

• Durable and precise rear derailleur for smooth shifting on entry-level MTB and hybrid drivetrains