Tesla claims this foam reduces the peak noise to 6 dB at 200 Hz, making music and conversations clearer. Having a tire with foam is not required, but you'll hear a lot more road noise without it ...

So, yes, despite its stratospheric road-test score ... The Model S has no spare tire, no air compressor, and no run-flats. If you have a flat, you'll have to call Tesla's roadside assistance.

If your tires can't grip the road, then your car isn't going anywhere. Tesla incorporates three features commonly found in other performance cars to maximize traction between the tires and the ...