Porsche 911 Carrera Manual page 242

Tires, Rims, Tracks
Tire
Summer tires front 235/40 ZR 18 (91Y)
rear 265/40 ZR 18 (101Y) XL
or front 235/35 ZR 19 (87Y)
rear 295/30 ZR 19 (100Y) XL
Snow tires front 235/40 R 18 91V M+S
rear 265/40 R 18 97V M+S *
or front 235/35 R 19 87V M+S
rear 295/30 R 19 100V XL M+S*
The load capacity coefficient (e.g. "91") and maximum speed code letter (e.g. "Y") are minimum requirements.
Warning!
Installation of sizes not authorized by
Porsche may have a dangerous effect on
the driving stability and could result in
severe personal injury or death.
f Before mounting new tires, check with your
Porsche dealer about the current release
status.
242
Technical Data
Rim Rim offset
8 J x 18 H2 57 mm
10 J x 18 H2 58 mm
8 J x 19 H2 57 mm
11 J x 19 H2 67 mm
8 J x 18 H2 57 mm
10 J x 18 H2 58 mm
8 J x 19 H2 57 mm
11 J x 19 H2 67 mm
Track
58.5 in./1486 mm
60.4 in./1534 mm
58.5 in./1486 mm
59.7 in./1516 mm
57.8 in./1486 mm
60.4 in./1534 mm
57.8 in./1486 mm
59.7 in./1516 mm