Tallac Design's Vier lock
The Vier consists of two locking bodies and two 14 mm-thick shackle sections, all of which are made of vinyl-covered hardened steel
Plans call for the shackles to be available in three lengths, to accommodate different sizes and styles of bike frames
Two keys are included with each lock
The Vier's locking mechanism
The Vier in its disassembled state
The keyhole is protected by a sliding aluminum cover when not in use
Once everything is locked together, the Vier has a reported 1.5 tons (1.36 tonnes) of pull strength
After the lock is taken back apart for transport, it's stuffed into an included zippered pouch
The pouch is reportedly "the size of a burrito"
It can be mounted under the saddle using an integrated strap
There's little doubt that bicycle thieves are deterred more by U-locks than by cable locks. The form factor of U-locks, however, can make them awkward to transport. That's why California cyclists Allen and Paige Young have created the Vier lock. It's designed to offer the security of a U, but it disassembles into a package "the size of a burrito" when not in use.
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