USD $‎626.99

Box One Prime 9 X-Wide Multi Shift Groupset

  • • Prime 9™ Technology
  • • Includes Our Simplest & Best Performing Cassette
  • • Ultra-Wide Ratio with Consistent Progression
  • • Durable Lightweight Unibody Construction Cassette
  • • Shifter offers 2 pc Pull Lever / Up to 3 Gears Per Shift
  • • Not Intended for E-Bike Use

  • • Box One Prime 9 Drivetrain Components
  • • Box Two Prime 9 Drivetrain Components
  • • Box Three Prime 9 Drivetrain Components

    MaterialCarbon Fiber / Nylon Composite, Steel, Aluminum Alloy
    FinishHard Onyx
    HardwareHardened Alloy Steel
    Our Box One tier is for those of you who just aren't satisfied with anything but the BEST! You like to get up there where the air is thin and the details matter. Every single cog on the 11-50T cassette is steel, yet it barely tips the scale at 360 grams; along with the chain, its surface is Dual-coated with DLC + Nickel and is both beautiful and durable. Your thumb will push a textured die-cast lever on a shifter that's had its hinged clamp whittled away by our CNC machines. Let's finish this package off with a derailleur that flaunts a Fully Adjustable Tri-Pack™ Clutch and super-smooth sealed bearing pulleys. Pamper yourself a little; you know you deserve it.

  • Prime 9 Comparsion Chart

  • Prime 9 Box One & Two Installation


    Yes. All Box One Twin Lever Shifters come with a stainless steel shift cable.

    To remove it, use a Phillips head screwdriver and turn it counter-clockwise a quarter turn You can then push the cap out by applying pressure to the cable from the other side. Please Note: The Cable Port is not a screw that un-threads from the cable port if you turn the cable port screw more than 90 degrees damage may occur.

    No, traditional 9 speed systems use a Cable Pull that is not compatible with Prime 9.


    No, Shimano direct mount hangers are proprietary and are not compatible with Box derailleurs.

    No, traditional 9 speed systems use a Cable Pull that is not compatible with Prime 9.

    No, Box Prime 9 derailleurs are not currently compatible with drop bar shifters, but we do offer a clamp for our shifters to mount on some 31.8mm drop handlebars.

    We suggest removing the derailleur from the bike and using a soft bristle brush or rag with soapy water or a mild degreaser. We do not recommend pressure washing, strong solvents or de-greasers as they could degrade the surface coating.

    Please see our installation video at


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