just swapped my R wheels for X ones after riding dirt this weekend. Here is whats i have using a digital bathroom scale.
stock WRR wheels, tires, tubes, rotors, spacers and 48t alum rear sprocket
Front wheel complete 18.5 lbs
Rear wheel complete 25.8 lbs
total of 44.3 lbs
My stock WRX wheels complete with rotors, stock sprocket, spacers,tires (distanzias), tubes etc
Front wheel complete 23.5 lbs
Rear wheel complete 29.5 lbs
Total of 53 lbs