BOX Three Prime 9 X-Wide Rear Derailleur

Color: Matte Black
Size: One Size
Choose a shipping method

Members get an estimated $8.40 back on this item as a part of your annual .

Members get an estimated $8.40 back on this item.
To buy,  sign in as an REI Co-op Member or join now.

Built for light to medium terrain, the BOX Three Prime 9 X-Wide rear derailleur offers great all-around performance with its Limited Slip Clutch™, sealed bearing pulleys and solid construction.

  • Features

    • Includes a nonadjustable Limited Slip Clutch to maintain chain tension and stability
    • Constructed with a stamped aluminum cage, die-cast aluminum linkages and a glass-nylon composite knuckle for durable performance
    • Designed for use with standard derailleur hangers (not direct mount)


    View the BOX Prime 9 Product LineView all BOX Rear Derailleurs
  • Technical Specs

    Best Use

    Mountain Biking

    Derailleur Type


    Cage Length

    Long Cage

    Max Rear Cog Size





    349 grams

  • Reviews
    0 reviews

    Loading Reviews...
  • Questions & Answers

    Loading Questions...