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Advice
Tyre code
Fig. 254 Universal code on tyres
Radial
Rim di
amet
er c
ode
Load index & speed rating
DOT tyre identification number
Severe snow conditions
Tyre ply composition and materials used
Max. load rating
Treadwear, traction and temperature
grades
Max. permissible inflation pressure
Passenger car tyre
Nominal width of tyre in millimetres
1
2
3
4
5
6
7
8
9
10
11
Ratio of height to width (aspect ratio)
Tyre code (example): Meaning
P215 / 55 R 16: Size:
P Passenger vehicle code.
215
Nominal width between walls, in
mm.
55 Height/width ratio in %
R Tyre type (R indicates “Radial”).
16 Rim diameter in inches
91 V Load index ››› page 295 and speed
rating ››› page 295.
XL Reinforced tyres (“Reinforced”).
M+S or M/S Winter tyres (mud and snow tyres)
››› page 295.
SSR or DSST,
Eufonia, RFT,
ROF, RSC, ZP,
Conti-Seal
Specific manufacturer codes for run-
flat tyre codes.
RADIAL
TUBELESS
Radial tyre without inner tube.
E4 ... E-mark certifying tyre complies with
international legislation followed by
a number denoting the country
granting the authorisation. The au-
thorisation number ( several digits)
is shown below.
12
Tyre code (example): Meaning
DOT BT RA TY5 1716: Tyre identification number (TIN
a)
,
maybe only on exterior wall of the wheel) and date of
manufacture.
DOT The tyre complies with the legal re-
quirements of the US Department of
Transport, responsible for tyre safety
regulations.
BT Place of manufacture code.
RA Information about manufacturer and
tyre size.
TY5 Manufacturer's tyre specifications.
1716 Date of manufacture: week 17 of
2016.
TWI This identifies the position of the
Tread Wear Indicator ››› page 292.
MAX LOAD
615 KG
(1356 LBS)
US load rating, indicating maximum
permitted load per tyre.
MAX INFLATION
350 KPA (51 PSI)
US limit, indicating maximum per-
mitted tyre pressure.
SIDEWALL 1 PLY
RAYON
Information about tyre wall compo-
nents: 1 layer of rayon (artificial
silk).
TREAD 4 PLIES
1 RAYON +
2 STEEL + 1 NY-
LON
Information about tread compo-
nents: In the example, there are 4
layers below the tread: 1 layer of
rayon (artificial silk), 2 layers of
steel reinforcement and 1 layer of
nylon.
294
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