Electric mountain bikes are both a godsend and a curse if you like riding on trails. There’s an old saying that you have to “earn your turns”—that the dopamine-boosting swerves and leaps down a pump ...

Is the bike going to explode? I didn’t know, but I was about to find out. In September, I was riding the Santa Cruz Bullit X0 AXS RSV electric mountain bike, and following Kurt Sorge, three-time Red ...