BOX One Rear Derailleur - 11 Speed, Long Cage, Hard Onyx, With Clutch


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  • The BOX One 11-Speed Rear Derailleur is designed to easily handle wide range cassettes, while maintaining chain tension.
    • The Adjustable Tri-Pack Limited Slip Clutch system reduces derailleur cage bounce and chain slap, while also maintaining tension for better chain wrap
    • Clutch force can be adjusted to give the user the ability to tune their setup to the desired balance of shifter feel and chain retention
    • Impact resistance is improved by forged linkages
    • Pivot-Tech spring-loaded cable stay keeps cables and housing out of harm's way
    • Precision Sealed Bearing Pulleys
    Item Specifications
    Cage Length Long
    Chain Wrap Capacity (teeth) 39
    Color Hard Onyx
    Drivetrain Speeds 11
    Largest Cog 50
    Rear Der/Shifter Compatibility BOX 11-Speed
    Rear Derailleur Mount Type 10x1 Standard
    BOX One Rear Derailleur Rear Derailleur
  • United States Shipping:

    Everything in the entire store ships for free to the USA, it's that simple, no catch. The free service will likely be FedEx depending on the size of the package. Please see our USA Shipping Options page for more info. Everything ships pretty darn fast since we have a shop/shipment center on the West and East Coast.

    International Shipping:

    International shipping is available on 99% of our products. Shipping cost can be calculated on the cart page or during checkout. We are experts at international shipping so please buy with confidence. We have great prices on Usps Priority & Express services, all services will include a tracking number. Please see our International Shipping Options page for more info.

    In-Store Pickup:

    If you would like to pick up your online order in store simply select the Store Pickup option during checkout (this is free of course). Please see our In-store Pickup Options page for more info.


    We offer a 45 day return period on all new items. We want our customers to be happy and returns to be easy. Please see our Return Policy FAQ's page for more info.

Sku: RD9506


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