BOX Three Prime 9 Shifter – 9-Speed Single Shift Matte Black. The Box Three shifter combines performance and value at an affordable price point. It makes good use of nylon composites in both top and bottom shells as well as the levers. Not only is the shifter mechanism joyfully simplified but fewer shifts are needed for every mile of travel. Prime 9 is also terribly forgiving so you wont have to constantly adjust your set-up.

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