It really depends on the design of the rims especially the spokes. I have +33 at the front and it didn't clear the calipers. Had to put in a real thin spacer. 2-3mm to clear them. The rears are usually not a problem.
It appears that Lamboghini’s Sesto Elemento concept will be joining the slew of other concepts making the jump to reality following the greenlight by the Raging...