PS. I have a partial set of wheels that look like the ones on your car. I had them on a 928. slid and curbed one on the rear, cracked rim too much to fix. so have one rear and the set of front. incl tires that are pretty worn.
now have a set of 18" on the 928.
let me know if interested and I'll check the offset and sizes. think they are 8 and 9" X 17" no idea if they will work on a 911.
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Bob Cox
78 930 clone project car.
87 924S resurrect at some point.
84 928S, Ruby Red linen/brown interior - sold
86 944 turbo my new DE/track car - sold