Alfa Romeo 4C Spider 2020, Owner'S Manual

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SERVICING AND MAINTENANCE 127
65, 85, 80 = Aspect ratio in percent (%)

Ratio of section height to section width of tire, or
10.5 = Section width in inches (in)
R = Construction code

"R" means radial construction, or

"D" means diagonal or bias construction
15, 16, 18 = Rim diameter in inches (in)
Service Description:
95 = Load Index

A numerical code associated with the maximum load a tire can carry
H = Speed Symbol

A symbol indicating the range of speeds at which a tire can carry a load corresponding to its load index under certain operating conditions

The maximum speed corresponding to the speed symbol should only be achieved under specified operating conditions (i.e., tire pressure, vehicle
loading, road conditions, and posted speed limits)
Load Identification:
Absence of the following load identification symbols on the sidewall of the tire indicates a Standard Load (SL) tire:

XL = Extra load (or reinforced) tire, or

LL = Light load tire or

C, D, E, F, G = Load range associated with the maximum load a tire can carry at a specified pressure
Maximum Load – Maximum load indicates the maximum load this tire is designed to carry
Maximum Pressure – Maximum pressure indicates the maximum permissible cold tire inflation pressure for this tire
EXAMPLE:
7
20_4C_OM_EN_USC_t.book Page 127