The redesigned Mirandetta swaps its aluminum axles and metal steering column for printed parts.
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Miranda built the original in roughly 10 days as a "travel hack" — the smallest motorbike an adult could ride that still packed into checked luggage. To achieve this, he relied on aluminum wheel axles and an all-metal steering column assembly, and now the released design replaces both with printed parts.
Miranda also standardized the lighting on off-the-shelf T10 automotive sockets and bulbs instead of the salvaged components in the original, cut the number of distinct screws, and constrained every part to a 300mm x 300mm build volume. He says the redesign took more work than building the first bike from scratch. The reference printer is the Prusa CORE One L , a 300mm x 300mm x 330mm machine that we've reviewed previously. Anything smaller, including the standard 250mm-class CORE One, can't fit the largest parts in one piece.
Watch On The wheels use lawnmower tires, which are normally too flat-profiled to lean on, and Miranda printed the rims narrower than standard so the tire's internal bead rings sit closer together; once inflated, the sidewalls can't splay outward and the tread rounds into a profile usable for cornering.
Braking uses floating motorcycle discs rather than the bicycle discs because the floating discs can be deriveted to open up a wider center bore that a printed axle passes through without shearing. Meanwhile, a belt drives the rear wheel, and the throttle is a 10K linear potentiometer mapped through an Arduino to the motor's electronic speed controller.
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Reference reading
- https://www.tomshardware.com/3d-printing/SPONSORED_LINK_URL
- https://www.tomshardware.com/3d-printing/ivan-miranda-releases-files-for-a-3d-printed-electric-motorbike-that-fits-in-a-suitcase#main
- https://www.tomshardware.com/subscription
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