Electric bikes are one of the hottest cycling trends in parts of Europe. Also known as e-bikes or pedelecs, they are fitted with a small electric motor powered by a rechargeable battery, which can give you a nice boost when cycling uphill.
It's not a new invention: bicycles powered by electricity have been around for more than a century. But sales have taken off with the development of lighter and higher-capacity batteries and sexier designs.
China is the dominant market, with more than 100 million e-bikes on the streets. But sales are surging rapidly in Europe, especially in Germany but also in the Netherlands, where about one in five bicycles is electric, according to industry reports.
Ritter reported from Stockholm. AP writer Toby Sterling in Amsterdam contributed to this report.