The base wheel is the 19" Slipstream wheel which is 19X8.0" and is fitted with 245/45-19 tires (no stagger). An optional 19" wheel is the Cyclone Wheel which is also 19X8.0" front and rear. The third option is the 21" Turbine wheels which come in 21X8.5" fitted with 245x35-21 up front, and 21X9.0" fitted with 265x35-21 Michelin Pilot SS in the rear.
I'm still debating whether the Turbine wheel/tire package would be a safe bet on a P100D through winter and would welcome any inputs from those that have experience with these.