Anyone who has ridden an electric Citi Bike compared to a regular model can understand an e-bike’s appeal: It makes pedaling easier, commuting faster, and hauling bigger, heavier items more feasible.

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 ...

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