HERE IS THE INFO I FOUND ON CENTER BORE MEASUREMENTS THANKS TO RONNIE @ BIMMERFORUMS.CO.UK
ACCORDING TO THIS INFORMATION, IT LOOKS LIKE IT'S THE NON-M E39 THAT HAS THE 74MM BORE SO THESE SHOULD FIT E39 M5 AS WELL AS E60 M5/M6
THE WEIGHT SPECS I FOUND WERE 38.5 LBS IN FRONT AND 40 LBS IN BACK. DEFINATELY NOT AS LIGHT AS FORGED BUT ALSO NOWHERE NEAR AS PRICY!
NOTE: I AM LEAVING FOR VACATION TONIGHT THROUGH NEXT TUESDAY BUT SHOULD HAVE ACCESS TO INTERNET (OR SO I'M TOLD!).
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All ET/OFFSET is dependent on tyre and wheel size so bear this in mind if trying to fit wheels from one model to another, also if the car is lowered then you may have issues with rubbing/non fitment.
The higher the ET number the more the wheel will sit inside the wheel arch
1 Series E81/82/87/88 = PCD 5x120, centre bore 72.5mm and M12x1.5 bolt thread. ET 35-45
3 Series E21 = PCD 4x100, centre bore 57.0mm and M12x1.5 bolt thread. ET 12-20
3 Series E30 = PCD 4x100, centre bore 57.0mm and M12x1.5 bolt thread. ET 15-35
3 Series E30 M3 = PCD 5x120, centre bore 72.5mm and M12x1.5 bolt thread. ET 27-30
3 Series E36 = PCD 5x120, centre bore 72.5mm and M12x1.5 bolt thread. ET 30-40
3 Series E36 M3 = PCD 5x120, centre bore 72.5mm and M12x1.5 bolt thread. ET 30-40
3 Series E46 = PCD 5x120, centre bore 72.5mm and M12x1.5 bolt thread. ET 30-45
3 Series E46 M3 = PCD 5x120 centre bore 72.5mm and M12x1.5 bolt thread. ET 20-25
3 Series E90/91/92/93 = PCD 5x120, Centre bore 72.5mm and M12x1.5 bolt thread. ET 30-45
3 Series E90/92/93 M3 = PCD 5x120, Centre bore 72.5mm and M12x1.5 bolt thread. ET 34-37
5 Series E28 = PCD 5x120, centre bore 72.5mm and M12x1.5 bolt thread. ET 18-25
5 Series E34 = PCD 5x120, centre bore 72.5mm and M12x1.5 bolt thread. ET 13-20
5 Series E34 M5 = PCD 5x120, centre bore 72.5mm and M12x1.5 bolt thread.
5 Series E39 = PCD 5x120, centre bore 74.0mm and M12x1.5 bolt thread. ET 15-25
5 Series E39 M5 = PCD 5x120, centre bore 72.5.0mm and M12x1.5 bolt thread. ET 15-25
5 Series E60/61 = PCD 5x120 centre bore 72.5mm and M12x1.5 bolt thread. ET 15-32
5 Series E60 M5 (Saloon) = PCD 5x120, centre bore 72.5mm and M12x1.5 bolt thread. ET 12-32
5 Series E61 M5 (Touring) = PCD 5x120, centre bore 72.5mm and M12x1.5 bolt thread. ET 12-32
6 Series E24 = PCD 5x120, centre bore 72.5mm and M12x1.5 bolt thread.
6 Series E63/64 = PCD 5x120, centre bore 72.5mm and M12x1.5 bolt thread. ET 14-20
6 Series E63/64 M6 = PCD 5x120, centre bore 72.5mm and M12x1.5 bolt thread. ET 12-20
7 Series E32 = PCD 5x120, centre bore 72.5mm and M12x1.5 bolt thread. ET 19-26
7 Series E38 = PCD 5x120, centre bore 72.5mm and M12x1.5 bolt thread. ET 13-25
7 Series E65/66/67/68 = PCD 5x120, centre bore 72.5mm and M14x1.5 bolt thread. ET 15-25
8 Series E31 = PCD 5x120, centre bore 72.5mm and M12x1.5 bolt thread.
X3 E83 = PCD 5x120, centre bore 72.5mm and M14x1.5 bolt thread. ET 40-45
X5 E53 = PCD 5x120, centre bore 72.5mm and M14x1.5 bolt thread. ET 40-45
X5 E70 = PCD 5x120, centre bore 74.0mm and M14x1.25 bolt thread. ET 37-53
X6 E71 = PCD 5x120, centre bore FRONT 74.0mm, centre bore REAR 72.5mm and M14x1.5 bolt thread.
Z1 E30Z = PCD 4x100, centre bore 57.0mm and M12x1.5 bolt thread.
Z3 E36 = PCD 5x120, centre bore 72.5mm and M12x1.5 bolt thread. ET 30-40
Z3 M Coupe/M Roadster = PCD 5x120, centre bore 72.5mm and M12x1.5 bolt thread.
Z4 E85 = PCD 5x120, centre bore 72.5mm and M12x1.5 bolt thread. ET 45-52
Z8 E52 = PCD 5x120, centre bore 72.5mm and M12x1.5 bolt thread.