width Alfa Romeo 4C 2013 Owner handbook (in English)

WHEELSRIMS 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. 128:
205/45 R 17 88Y205
Rated width (S, distance in mm
between sidewalls)
45
Height/width ratio (H/S) as a
percentage
RRadial tyre17
Rim diameter in inches (Ø)
88
Load rating (capacity)
YMaximum speed ratingMaximum speed rating
Qup to 160 km/hRup to 170 km/hSup to 180 km/hTup to 190 km/hUup to 200 km/hHup to 210 km/hVup to 240 km/hW
up to 270 km/h
Yup to 300 km/h
Maximum speed index
for snow tyresQM+S
up to 160 km/h
TM+S
up to 190 km/h
HM+S
up to 210 km/h
Load rating (capacity)
60 = 250 kg 76= 400 kg
61 = 257 kg 77= 412 kg
62 = 265 kg 78= 425 kg
63 = 272 kg 79= 437 kg
64 = 280 kg 80= 450 kg
65 = 290 kg 81= 462 kg
66 = 300 kg 82= 475 kg
67 = 307 kg 83= 487 kg
68 = 315 kg 84= 500 kg
69 = 325 kg 85= 515 kg
70 = 335 kg 86= 530 kg
71 = 345 kg 87= 545 kg
72 = 355 kg 88= 560 kg
73 = 365 kg 89= 580 kg
74 = 375 kg 90= 600 kg
75 = 387 kg 91= 615 kg
128
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READING THE RIM CODE
Example fig. 128:7Jx
17 H2 ET 337rim width in inches (1).Jrim drop centre outline (side
projection where the tyre bead rests)
(2).17
rim fitting diameter in inches
(corresponds to the diameter of the
tyre to be mounted) (3 = Ø).
H2
shape and number of humps
(circumference measurement which
keeps the bead of tubeless tyres
in position on the rim).
ET 33
wheel camber (distance between
the disc/rim support plane and
the wheel rim centre line).RIM PROTECTOR TYRES
136)
WARNING
136) DO NOT fit hub caps when
using integral hub caps fixed (with
springs) to the steel rim and
after-sale tyres provided with Rim
Protector (fig. 129). The use of
unsuitable tyres and hub caps
may cause sudden loss of tyre
pressure.129
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TECHNICAL SPECIFICATIONS
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