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Yerka is a bike that doubles as a lock


Steal this, buddy!

You can have the best bike lock in the world, but it's no guarantee your ride will be there when you get back. Yerka is foolproof – the lock is built into the bike, so if the thief wants to take it, they have to cut through the frame, rendering the theft pointless.

Here's how it works – part of the frame opens up. You take the seat tube out and slot it into the gap, and clip it around whatever you want to lock it to. Hey presto, an unstealable bike.

It also means no one can make off with your saddle, as it's part of the locking mechanism.

Check out the video at the bottom of the page to see it in action.

The action takes less than 10 seconds. You can lock it to anything you'd shackle your bike to – lampposts, bike docks, fences. As long as the object you'd locking to is less than eight inches in diameter, you're golden.

The wheels are secured with special nuts, so no one will make off with them either.

The team are also working on making it sync via Bluetooth to your phone. Which could mean you unlock on your mobile in future.

Read more: Sesame: the smart lock that lets you in when you knock

It's a nifty idea, but not without its downsides. There's no word on what the bikes are like to ride, and with no notable heritage or experience in the field, that will turn off a lot of cyclists. You can buy the frame and add your current bike's wheels and components to it, but that seems a lot of hassle. We reckon the company would be better off licensing its mechanics to the big brands.

It's raised over $21,000 of its $50,000 goal. The bikes start at $399 (£262), or $199 (£130) for just the frame.

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