Yerka Lock-In-Frame Bike

While it’s not quite ready for prime time, the Yerka Project is still of great interest to us if for one reason: it’s the world’s first nigh impossible-to-steal bike. Its secret involves a frame that also doubles as its own lock: Yerka’s down tube opens up and folds outwards to give a few inches of clearance for slipping this bike through a tree, post, or rack. Then, remove the seat post, slide it through, and lock it, simultaneously securing your saddle, seat post, and frame while also sparing you the need of lugging around a hefty lock. Cutting through the lock results in partially destroying the bike – quite the contrary goal of any sensible bike thief – making this bike the hardest to steal yet providing its lock is resilient to picking attemps.

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