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This is part 3 of an ~8-part series I’m doing on bike-powered devices. If you’ve got a link to another device that should be included or a better-documented version of any of these, comment below or email me and I’ll add it to my last post in the series, summarizing all the interesting pedal-powered projects we’ve found by category. I learned about most of these devices through the old-news Innovate or Die contest.

Here are some outdoor tools you can bike-power with a modified bike. My favorite, the mulcher:

Also crank on:

Anybody have a bike-powered weed wacker?



  1. ionymous says:

    Don’t gas powered mulchers handle branches and not just twigs?

    Maybe some gearing would help?
    How about using some gearing to pedal a big concrete flywheel up to speed. Now you’ve got some serious stored energy. Get off and mulch bigger branches until the flywheel slows down. Repeat.