It’s the basic recipe that made the Ford F-Series the nation’s best-selling vehicle for the past 41 years. There’s another side to the segment, though.

Historically, auto-makers have experimented with off-beat trucks that are small, fast, part-SUV or built on a unibody platform. Some sold well while others floundered. Here are some of the pickup trucks that broke with tradition in North America, from the oldest to the most recent: