So you're planning to run tyres that are not intended for the wheel? Why not go the whole hog and only half tighten the wheel nuts too?
It's just doing half a job. If you drive an EK9, why on earth would you fit the wrong tyres to a performance vehicle?! They are the only part of the car that keeps you from sliding into a tree and being killed.
Sorry to sound like an *******, but this stance thing gets right on my tits.