The young Italian engineer Gianluca Sada from Turin wanted nothing less than to reinvent the wheel. The 31-year-old is the father of the Sada bikes, a foldable bicycle without spokes and without hubs. He has had a large part of the technology patented. The expensive city bike should go into series production in the summer.
The young Italian was looking for a topic for his doctoral thesis more than seven years ago. On walks through Turin he met children with a two-wheeled sliding toy on a stick. Ah, he thought, these are interesting wheels with complete discs, but without spokes. What can you do with it in everyday life? An idea occurred to him. The engineer was inspired by the construction of the children's toy, developed it further and made it the subject of his doctoral thesis as a serious invention. The bike by Gianluca Sada is intended as a city bike, easy to fold and stow in a specially designed backpack. So it can be carried on the back and taken on buses and trains. Nevertheless, it will probably not revolutionize traffic, because the bike, currently still a prototype, will cost far too much for that. It's been seven years since Sada started working on the bike.
The Sada bike is something like the Swiss army knife of bicycles. If you tilt the saddle forward, the bike folds up to the size of a stick umbrella – without wheels, of course. These are stowed in a backpack. Since the spokes are missing, other things can be stowed in the middle, such as a laptop. The backpack also has a zip, which makes it possible to use the bike's wheels as a transport aid - then the backpack becomes a trolley. The total weight of the bicycle prototype is currently twelve kilos. Compared to other folding bikes that have 16- to 20-inch wheels, the Sada bike has huge 26-inch wheels. With this, Sada wants to increase driving comfort, which would otherwise suffer from the hard metal wheels. These are not only bigger than normal folding bikes, but also a bit wider, says Gianluca Sada. Almost the entire wheel is made of aluminum. Even if the prototype doesn't give any indication - the Sada bike will have traditional hand brakes. "The first prototype had a coaster brake," says Sada. But in Italy, unlike in Germany, the Netherlands or Scandinavia, this brake is not very common. That's why he's converting now. If Sada fails with his bike, the young inventor has made provisions. He works full-time for the Italian commercial vehicle manufacturer Iveco, the bicycle was created in his free time.
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