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The 8-Bit Chainbreaker + Utility Knife Multi-Tool has four functions. It has a chainbreaker on one end and a retractable utility blade on the other. The chain tool is operated by an included 3mm hex L key that doubles as a tire plug inserter. A machined slot fits the L key and converts the entire multi-tool into a tire plug inserter, with the forked end of the L key extending outward. The handles of this multi-tool slide open to provide storage for tire plug inserts, a valve core, and a spare mini utility blade. The fourth function of the tool is the 16mm head of the chainbreaker end that can be used to tighten crankarms on the road or trail.

This multi-tool is designed to work on its own or be grouped with other 8-Bit System multi-tools. All three multi-tools nest together via magnets and clever machining. These were designed to solve most trailside fixes to get you back to the trailhead or next town. They are strong, versatile, lightweight, and small enough to fit in a jersey pocket or riding tool wrap.

8-Bit system stackable multi-tools

In this "how-to" video learn to:

  • use the blade
  • replace the blade
  • use the chainbreaker
  • use the tire plugger
  • stack the tools


8-Bit Utility Blade sizes

  • Presta valve core can not exceed 25.4mm in length (Presta valve core not included)
  • The end of the chainbreaker functions as a 16mm hex wrench which is used on some crank arms. The torque limit for the 16mm wrench is 10Nm.

Right to Repair. Replacement parts are available for this product.

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Tech Specs

    Weight:  71 g

    Dimensions: 146mm x 20mm x 11mm

    Material7075-T6 aluminum

    Includes: 5 Tire plugs, mini utility blade, spare mini utility blade, tire plug inserter/3mm allen key

      Made in the USA

      Patents Pending

        WARNING Handling this product will expose you to chemicals, including lead, known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling. For further information go to www.P65Warnings.ca.gov.

        Patent and trademark information