Identifying size for 18-inch Turbo wheels (Technologie wheels): General

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) and the Boxster. .

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

Fig 1: Identifying Screwed-In Steel Valve And Rubber Valve

Courtesy of PORSCHE OF NORTH AMERICA, INC.