well, now chilen students have come up with the unstealable bike. ucia newman has the story. >> 20% of bikes are stolen, that means 30 million bicycles are snitched every single year. these of course are all bicycles. but in actual fact they're more like sitting ducks. every single one of them has a lock. some are big and strong, some are rather flimsy but there isn't a single one of them that can't be cut. sass this security camera shows all you need is a good set of pliers and in minutes you can literally ride off. but not if you have aelleka. a bike almost impossible to steal. invented by three chilen students. the prototype. fir you lower it on a bar, put out the seat and insert it like this. it automatically locks and you pull out the key. >> if you saw off the tube of the seat you can't put the bike back together again because the bar can't be joined. you have the to have the lower bar or the bike will collapse and break. >> reporter: the yellka is meant for the city. >> this has an akil achilles he. does it not? >> you can use a personal code

now three students have come up with a novel invention and they call it the unstealable bike. >>reporter: here's a little known fact. the world produces three times more bicycles than cars and 20% of them are stolen. that means 30 million bicycles are taken every single year. these of course are all bicycles but in fact they're more like sitting ducks. every one of them has a lock. some are big and strong. some are rather flimsy. but there's not a single one of them that can't be cut. >> the bar can't be joined. it's blocked, and you have to have the lower bar or the bike will collapse and bend in half. it makes stealing the bike pointless. >>reporter: it's simple. light weight. and made for the city where most bikes are stolen >> this bike clearly has one problem which is a lock. >> yes, the key is the most vulnerable part so we're devising a way to bypass the problem with a mobile phone, use a code to unlock it, not a key. >>reporter: with the global trend of people seeking healthier, simpler lives, the bicycle market is growing 20% every year. not bad for three engineering

now three chilen students have come up with a novel invention, the unstealable bike. lucia newman has the details. >> reporter: here's a little known fact. the world produces three times more bicycles than cars and 20% of them are stolen. that means, 30 million bicycles are snitched every single year. these of course are bicycles but in actual fact they're more like sitting ducks. every single one of them has a lock. some are big and strong, some are rather fmsy but there isn't a single one that can't be cut. as this security camera shows, all you need is a good set of pliers and in minutes you can literally ride off. but not if you have a yellka, a bike almost impossible to steal. invented by three chilen students. first you open the lower bar and lean it into say a light post. then you pull out a seat and insert it like this. it automatically locks and you pull out the key. >> translator: if you saw off the tube of the seat you can't put the bike together again because the bar can't be joined. it's blocked and you have to have the lower bar or the bike will collapse