Weight 15x8 steel Sunrayasia rim

[TuffTD42]

Hi guys.
Anyone ever weighed & know the weight of a 15x8 Roh steel sunraysia rim? I want to lessen my unsprung weight & swap to alloys. But the tyres I'm looking at are the Toyo open country MT's which are 6kg heavier than say a KM2 in the same size. Apparently there are no KM2's available in 315/75/16 atm. I really don't need to make the wheel tyre package heavier than it is. if it worked out the same well then I'd have to eat them apples. other wise liter the better.