
Peugeot Flat Spoke 15" 505 sti wheels, 17.4kg

Subaru Motion 13" Series 2 Vortex Turbo Wheels, 14kg

Subaru Universal 13" Steel Wheels, 14kg
So yeah, the steel and alloy Subaru wheels both weigh in at 14Kgs, but the Peugeot alloys are 3.4Kgs heavier! So I guess the factory wheels are the better option for performance and fuel economy. Glad I kept the set of Motion wheels!
...Finally got some tyres stripped off:
Subaru Motion wheel, 6kg

Peugeot 505 STI wheel, 9.5kg

It would be interesting to get some weights of some other aftermarket wheels like the Superlite, SSR or Simmons!