Thanks, Jes ! The wheels are original Oz split wheels for the Alfa SZ,they are 7,5x15 inch, and the offset is 35 i think. They were made in 1991.i drive on ROADSTONE (get it?) 195/50-r15 tyres.A wild guess would be compressor
Cool cars! Love your 75 - what exact wheel is that on the 75? Size, offset, etc? Oh, almost forgot, welcome!