US safety standards are _different_. Car standards are particularly messy in that a car that's road-legal in the EU probably isn't in the US and vice versa. Mostly small stuff; for instance they'll have different side mirrors.
Producing a version of these cars for US standards likely would not be difficult (every car manufacturer has to deal with about four standards regimes); it's just that they're no reason to do so currently.
Producing a version of these cars for US standards likely would not be difficult (every car manufacturer has to deal with about four standards regimes); it's just that they're no reason to do so currently.