I've replied to your question on fb - after i posted the list of weights there Doogle. And as i said - i got the list from here
I'd think the "Renault Cup" weight quoted; refers to the 8j Cup Racer Speedlines........
(For reference - list is below):
7.5x17 wheels:
Renault Sport 10,1Kg
Renault Speedline 10,1Kg
Renault Cup 9,1Kg
Renault Silverstone 10,7Kg
Platin 8x17 8,9Kg
Sparco Assetto Gara 7,5x17 8,6Kg
ATS GTR 8x17 8,5Kg
Motec TA-082 8,0x17 8,3Kg
Team Dynamics Race 7,5x17 8,1Kg
OZ Ultraleggera 8,0x17 7,74Kg
OZ Allergerita 8,0x17 6,98Kg
Motec Nitro 8,0x18 8,9Kg
OZ Ultraleggera 8,0x18 8,0Kg
OZ Allergerita 8,0x18 7,72Kg
Hope that helps.......