Jiggy: Thanks again

5.1 kgs? What kind of tyres are you using? According to
this site, both 185/60-14 and 195/50-15 seems to vary between 17 and 19 lbs, and the lightest wheel being a Hoosier weighing 14 lbs, wich should be around 6.3 kgs... I think your missus might have been tampering with your scale
Alan: Fiat alloys weighing less than half of an O.Z. Ultraleggera... I expect to see a dramatic increase in the price for Fiat alloys

But if its for just one, those steel rims are heavier than I hoped for (and Jiggy'll need to have a talk with his missus)
All this varying info is a bit confusing to put it mildly...