[ricardobeat]

They mention in their CES interview that putting two of these in the rear axle + a lighter version in the front can give you a 2500hp+ car. That is the other breakthrough, and matches the comparison chart they have on the website against other tech.

Disk brakes add another 4-5kg, maybe their wheel hub doesn't need one? At these power levels, regen is probably stronger than the largest brake disc you could fit.

You'll also have at least 150kg less on the car (motor/differential). Hard to tell what handling would be like until someone builds a test car.