width Alfa Romeo 4C 2015 Owner handbook (in English)

WHEELS
RIMS AND TYRES
Alloy rims. Tubeless radial carcass
tyres. All approved tyres are listed in the
Registration Document.
IMPORTANT If there are any
discrepancies between the Owner
Handbook and the Registration
Document, take the information from
the latter.
For safe driving, the car must be fitted
with tyres of the same make and type
on all wheels.
IMPORTANT Do not use air chambers
with tubeless tyres.
READING THE TYRE
CODE
Example fig. 137:
205/45 R 17 88Y
205Rated width (S, distance in mm
between sidewalls)
45Height/width ratio (H/S) as a
percentage
RRadial tyre
17Rim diameter in inches (Ø)
88Load rating (capacity)
YMaximum speed ratingMaximum speed rating
Qup to 160 km/h
Rup to 170 km/h
Sup to 180 km/h
Tup to 190 km/h
Uup to 200 km/h
Hup to 210 km/h
Vup to 240 km/h
Wup to 270 km/h
Yup to 300 km/h
Maximum speed index
for snow tyres
QM+Sup to 160 km/h
TM+Sup to 190 km/h
HM+Sup to 210 km/h
Load rating (capacity)
60= 250 kg76= 400 kg
61= 257 kg77= 412 kg
62= 265 kg78= 425 kg
63= 272 kg79= 437 kg
64= 280 kg80= 450 kg
65= 290 kg81= 462 kg
66= 300 kg82= 475 kg
67= 307 kg83= 487 kg
68= 315 kg84= 500 kg
69= 325 kg85= 515 kg
70= 335 kg86= 530 kg
71= 345 kg87= 545 kg
72= 355 kg88= 560 kg
73= 365 kg89= 580 kg
74= 375 kg90= 600 kg
75= 387 kg91= 615 kg
137A0L0114
171

READING THE RIM CODE
Example fig. 137:7Jx
17 H2 ET 33
7rim width in inches (1).
Jrim drop centre outline (side
projection where the tyre bead rests)
(2).
17rim fitting diameter in inches
(corresponds to the diameter of the
tyre to be mounted) (3 = Ø).
H2shape and number of humps
(circumference measurement which
keeps the bead of tubeless tyres
in position on the rim).
ET 33wheel compensation (distance
between the disc/rim support
plane and the wheel rim centre
line).
172
TECHNICAL SPECIFICATIONS