These electric bikes eliminate almost every excuse you have not to ride. Twenty years ago, Copenhagen was the first large city to start a bike-share program. Now that there are well over 500 cities with bike sharing, the Danish capital--which brands itself as the "world's cycling capital"--has reinvented bike sharing again. Its new fleet of electric, Wi-Fi -connected bikes are designed to get more non-cyclists to ride. "When [the city and partners] began a process of upgrading the existing bike-share system, they took a look at systems in cities like Paris, London, Berlin, Amsterdam, and Barcelona," says Torben Aagaard , CEO and co-founder of Gobike , the company supplying the new bike. "They wanted to have a system that was even better than all the existing examples they could see." The new bikes, which began rolling out earlier this year, aren't cheap to make, but each detail is designed to lower the barrier to ride. A theft-proof tab...