OK - from my highly accurate bathroom scales
Front with A048
Rimstock 17Kg
Speedline 15Kg
Rear with A048
Rimstock 20Kg
Speedline 18Kg
So an 8Kg saving with Speedlines …
You took your tyres and a set of bathroom scales through customs?
There should be an old post that Uldis and myself put up regarding wheel weights. If you measure them with the tyres on then you are also including for wear on them and any manufacturing tolerances.