Identifying size for 18-inch Turbo wheels (Technologie wheels): General
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Identifying 18-inch Turbo wheels (Technologie wheels / hollow spoke wheels) with the dimensions 9J x 18 RO 52 and 10J x 18 RO 65 (RO= Rim Offset) is only possible when the wheels are disassembled.
These wheels can also be fitted on the 911 Carrera (993 series) and the 911 Carrera (996 series).
The basic difference between Turbo wheels (Technologie wheels / hollow spoke wheels) and Turbo Look wheels (Turbolook Design wheels) is their valves:
Turbo wheel: screwed-in steel valve
Turbo Look wheel: rubber valve