Heavy as balls.
I weighed my GT/CS wheels/tires (245/45/19 Pzero Nero) and weighed about 70lbs on a scale. This was on an old scale, but I stood on the scale and subtracted my weight...getting just over 70lbs for a complete assembly.
For reference, I had 275/40/19 FK453's on TSW Jerez 19x9.5 and they weighed about 3lbs less total...which is surprising to say the least.
I also weighed Shelby CS40 wheels 20x9 with 275/35/19 Nitto Invo tires and they weighed 1lb over the stock setup. My 20x10 CS40 wheels with 295/35/20 Invo tires were about 3lbs over the stock setup.
All in all, I'd have to say that the stock PP/GTCS wheels are probably in the low 30lb range. Hope this helps.
2013 Mustang GT - 402A GT/CS - 6R80 - Glass Roof - Engine Block Heater - SGM Exterior - CB/Miko Interior
Steeda Adjustable PHB (Street) and Steeda PH Brace, Stainless Works Retro Catback Exhaust...