Hope someone can help me out here, I have 3 sets of GTS wheels, one set has been modified to 15" so there offset is no issue but the other two sets look un modified and have different offsets. So can anyone tell me if GTS wheels were factory made with these variations and for what reason/vehicle where they made for???

At this point I don't have the measurements I only noticed they were different when sorting them out in an annual garage clean up.
Regards
Duck05