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Tiny concept cars at the Frankfurt auto show

Concept cars from Mini, Citroen, Hyundai, and Mazda were all on hand at the 2009 Frankfurt auto show.

Citroen Revolte
The Citroen Revolte features suicide doors and a lounge-style rear seat. CNET

Small is clearly in, as these concepts show. And since concept cars are a bellwether for upcoming automotive trends, expect downsizing to be commonplace among new cars. Most of these concepts are lightweight city cars, easily maneuverable and economical. Mini's entrants add a sporty flavor, while Citroen and Hyundai go for the futuristic. Mazda showed off a stripped-down version of its MX-5, more weekend racer than everyday driver.