Speedometers are not effected if you get wheels with equal circumference, even if staggered. There are many owners who do have a staggered setup with AWD. On RWD you dont neccessarily need the wheel diameters to match BUT with AWD it would cause the comp to think there is slippage. Find a wheel + tire calculator through google and match it up. I have 245/40 in front and 285/35 in rear. Both equal and speedometer remains consistent to factory settings.
2015 Q50S, Moonlight Pearl White, Lighted kick panels, Navigation, package, none of the nanny drivers aids.