911 Turbo Cabriolet F6-3299cc 3.3L SOHC Turbo (1987)
The "VR" and "ZR" tires are identical in design and may even be mounted mixed on one car, for which "VR" tires are specified.
Information:
Approved "ZR" tires with the specification "N 1" may not be mounted together with "NO" tires on one car. Presently "N 1" tires are approved only for
911 Carrera 2 and 911 Carrera 4 cars.
928 Series Survey of Identical Design "VR" and "ZR" Tires
The "VR" and "ZR" tires are identical in design and may even be mounted mixed on one car for which "VR" tires are specified.
Information:
Approved "ZR" tires with the specifications "N 1" are presently approved only for 911 Carrera 2 and 911 Carrera 4 cars.