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307Wheels and tyres
Tyre code (example) Meaning
Make, logotype Manufacturer
Product name
Name of tyre assigned by manufacturer.
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 308 and speed rating
⇒ page 308.
XL Reinforced tyres.
M+S or M/S Winter tyres (mud and snow tyres) ⇒ page 304.
SSR or DSST, Eufonia,
RFT, ROF, RSC, ZP,
Conti-Seal
Specific manufacturer codes for run-flat tyres.
RADIAL TUBELESS Radial tyre without inner tube.
E4 ... E-mark certifying tyre complies with internation-
al legislation followed by a number denoting the
country granting the authorisation. The authori-
sation number ( several digits) is shown below.
DOT BT RA TY5 1709 Tyre identification number (TIN
a)
, may be only on
interior wall of wheel) and date of manufacture:
DOT The tyre complies with the legal require-
ments of the US Department of Trans-
port, responsible for tyre safety regula-
tions.
BT Place of manufacture code.
RA Information about manufacturer and tyre
size.
TY5 Manufacturer's tyre specifications.
1709 Date of manufacture: Week 17 of 2009.
Tyre code (example) Meaning
TWI
This identifies the position of the Tread Wear In-
dicator ⇒ page 303.
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 permitted tyre
pressure.
SIDEWALL 1 PLY RAYON Information about tyre wall components:
1 layer of rayon (artificial silk).
TREAD 4 PLIES
1 RAYON + 2 STEEL +
1 NYLON
Information about tread components:
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.
Information for the end consumer concerning the comparative values of
the established base tyres (standardised test procedures):
TREADWEAR 280 Relative service life of the tyre, with respect to
specific US standard test.
TRACTION AA Braking capacity of tyre on wet surface (AA, A, B
or C).
TEMPERATURE A Tyre temperature resistance at higher test
speeds (A, B or C).
If there are different letters, they are specific codes of the tyre manufac-
turer or specific national codes.
a)
The letters TIN refer to the tyre serial number.
Tyres with directional tread pattern
Tyres with directional tread pattern have been designed to operate best
when rotating in only one direction. An arrow on the tyre sidewall indicates
the direction of rotation on tyres with directional tread. Always observe the
direction of rotation indicated when mounting the wheel. This guarantees
optimum grip and helps to avoid aquaplaning, excessive noise and wear.
Safety First Operating instructions Practical Tips Technical Specifications
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