The FourJoy concept Smart will unveil at the Frankfurt auto show this week is a preview -- minus the doors and roof -- of the second-generation ForFour, a four-seater bound for the United States in 2015.
The concept follows the earlier For-Us and ForStars show cars in providing clues to the ForFour, which is being developed with Renault. The French automaker will offer its own version of the new car as a replacement for the Twingo.
Although the FourJoy has open sides and a large hole where a roof generally is, the concept's shape and silhouette is described as being close to Smart's second production model. It will be assembled alongside the third-generation Twingo at Renault's plant in Novo Mesto, Slovenia.
Design features include Smart's signature Tridion cell -- the exposed metal frame to which composite plastic body panels are attached. The frame is aluminum on the concept but will be high-strength steel on the production ForFour.