width Alfa Romeo GT 2009 Owner handbook (in English)

WHEELS
RIMS AND TYRES
Pressed steel or alloy rims.
Radial tubeless tyres.
The log book shows all the homologated
tyres.
IMPORTANTIn the event of any dis-
crepancies between this Handbook and the
vehicle Log Book, only the latter should be
considered.
While the specified dimensions remain the
same, for driving safety, the vehicle must be
fitted with tyres of the same brand and type
on all wheels.
IMPORTANTDo not use inner tubes
with Tubeless tyres.
COMPACT SPARE WHEEL
Pressed steel rim.
WHEEL GEOMETRY
Front wheel toe-in measured from rim to
rim: –1 ±0.6
The values refer to the vehicle travelling.
Example:
205/55 R 16 91 W
or
205/55 ZR 16
CORRECT TYRE READING
(fig. 5)
Below, please find the instructions need-
ed to understand the meaning of the code
stamped on the tyre.
The code may be in one of the ways giv-
en in the example.
205= Nominal width (S, distance in
mm between sides).
55= Percentage height/width (H/S)
ratio.
R= Radial tyre.
ZR= Radial tyre, with speed over 240
km/h.
16= Rim diameter in inches (Ø).
91= Load index (capacity), e.g. 91 =
615 kg. Not present in ZR tyres.
W,Z= Maximum speed index. In ZR
tyres the speed index Z is before
the R.
fig. 5
A0A0465b
TECHNICAL SPECIFICATIONS
246

TECHNICAL SPECIFICATIONS
247
Maximum speed index
Q= up to 160 km/h.
R= up to 170 km/h
S= up to 180 km/h.
T= up to 190 km/h.
U= up to 200 km/h.
H= up to 210 km/h.
V= over 210 km/h.
ZR= over 240 km/h.
W= up to 270 km/h.
Y= up to 300 km/h.
Maximum speed index
for snow tyres
Q M +S= up to 160 km/h.
T M +S= up to 190 km/h.
H M +S= up to 210 km/h. Load index (capacity)
60= 250 kg
61= 257 kg
62= 265 kg
63= 272 kg
64= 280 kg
65= 290 kg
66= 300 kg
67= 307 kg
68= 315 kg
69= 325 kg
70= 335 kg
71= 345 kg
72= 355 kg
73= 365 kg
74= 375 kg
75= 387 kg
76= 400 kg
77= 412 kg
78= 425 kg
79= 437 kg
80= 450 kg
81= 462 kg
82= 475 kg
83= 487 kg
84= 500 kg85= 515 kg
86= 530 kg
87= 545 kg
88= 560 kg
89= 580 kg
90= 600 kg
91= 615 kg
92= 630 kg
93= 650 kg
94= 670 kg
95= 690 kg
96= 710 kg
97= 730 kg
98= 750 kg
99= 775 kg
100= 800 kg
101= 825 kg
102= 850 kg
103= 875 kg
104= 900 kg
105= 925 kg
106= 950 kg
CORRECT RIM READING
Below, please find the instructions needed
to understand the meaning of the code
stamped on the rim, as shown in (fig. 5).
Example:
6,5 J x 15 H2 ET 43
6,5=rim width in inches (1)
J=rim drop centre outline (side pro-
jection where the tyre bead
rests) (2)
15=rim nominal diameter in inches
(corresponds to diameter of the
tyre to be mounted) (3=Ø)
H2=“hump” shape and number (relief
on the circumference holding the
Tubeless tyre bead on the rim).
ET 43=camber angle (distance between
disk/rim line and wheel rim cen-
tre line)