Class 2 ebikes are also limited to a top speed of 20 miles per hour, but they have throttles that work when you're not pedaling. That doesn't mean the motor won't assist you if you decide to pedal.

Most ebikes now cost between $1,000 and $3,000, with high-end models exceeding $5,000. But lower cost options are emerging, too. This month, three U.S. bikeshare companies, ...