Get Wheels and tires -> Tire labeling Guide for Mercedes CLA 4 Door Second Generation (2019-2024)

TTirire labelinge labeling

OvOverervieview of tirw of tire labelinge labeling

Uniform Tire Quality Grading Standards

DOT (Department of Transportation), (TIN)

Tire Identication Number

Maximum tire load (/ page 308)

Maximum tire pressure (/ page 308)

Manufacturer

Tire characteristics (/ page 309)

Tire size designation, load-bearing capacity,

speed rating and load index (/ page 309)

Tire name

The data shown in the illustration is example

data.

TTirire Quality Gre Quality Gradingading

In accordance with the US Department of Trans-

portation's "Uniform Tire Quality Grading Stand-

ards", tire manufacturers are required to grade

their tires on the basis of the following three per-

formance factors:

Tread wear grade

Traction grade

Temperature grade

The data shown in the illustration is example

data.

The classication is not legally stipulated for

Canada, but it is generally stated.

Trread wead wear grear gradeade

The treadwear grade is a comparative rating

based on the wear rate of the tire when tested

under controlled conditions on a specied govern-

ment test course. For example, a tire graded 150

would wear one and one-half (1\1/2\) times as

306306

Wheels and tires

well on the government course as a tire graded

100.

The relative performance of tires depends upon

the actual conditions of their use, however, and

may depart signicantly from the norm due to var-

iations in driving habits, service practices and dif-

ferences in road characteristics and climate.

Trraction graction gradeade

DANANGERGER Risk of accident due to inade-

quate traction

The traction grade assigned to this tire is

based on straight-ahead braking traction

tests.

Always adapt your driving style and drive

at a speed to suit the prevailing trac

and weather conditions.

NOOTETE Damage to the drivetrain from

wheelspin

Avoid wheelspin.

The traction grades, from highest to lowest, are

AA, A, B, and C. Those grades represent the tire's

ability to stop on wet pavement as measured

under controlled conditions on specied govern-

ment test surfaces of asphalt and concrete. A tire

marked C may have poor traction performance.

Tememperperaturature gre gradeade

WARNINGARNING Risk of accident from tire over-

heating and tire failure

Excessive speed, underination, or excessive

loading, either separately or in combination,

can cause excessive heat build-up and possi-

ble tire failure.

Observe the recommended tire pressure.

Regularly check the pressure of all the

tires.

Adjust the tire pressure, if necessary.

The temperature grades are A (the highest), B,

and C, representing the tire's resistance to the

generation of heat and its ability to dissipate heat

when tested under controlled conditions on a

specied indoor laboratory test wheel. Sustained

high temperature can cause the material of the

tire to degenerate and reduce tire life, and exces-

sive temperature can lead to sudden tire failure.

The grade C corresponds to a level of perform-

ance which all passenger car tires must meet

under the Federal Motor Safety Standard No.

109. Grades B and A represent higher levels of

performance on the laboratory test wheel than

the minimum required by law.

DOTDOT, T, Tiriree IdenticationIdentication Number (TIN)Number (TIN)

US tire regulations stipulate that every tire manu-

facturer or retreader must imprint a TIN in or on

the side wall of each tire produced.

Wheels and tires

307

The data shown in the image is example data.

The TIN is a unique identication number to iden-

tify tires and comprises the following:

DOT (DeparT (Department of Trtment of Transportansportation):ation): tire sym-

bol marks 1 indicating that the tire complies

with the requirements of the US Department

of Transportation.

Manuf

Manufacturacturerer identicationidentication code:code: manufac-

turer identication code 2 contains details of

the tire manufacturer. New tires have a code

with two symbols. Retreaded tires have a code

with four symbols. Further information on

retreaded tires (/ page 313).

Tirire size:e size: identier 3 describes the tire size.

Tirire type code:e type code: tire type code 4 can be used

by the manufacturer as a code to describe

specic characteristics of the tire.

Manuf

Manufacturacturing dating date:e: manufacturing date 5

provides information about the age of a tire.

The 1st and 2nd positions represent the cal-

endar week and the 3rd and 4th positions

state the year of manufacture (e.g. "3208"

represents the 32nd week of 2008).

InfInforormation on tmation on the maximum tirhe maximum tire loade load

The data shown in the image is example data.

Maximum tire load

1 is the maximum permissi-

ble weight for which the tire is approved.

Do not overload the tires by exceeding the speci-

ed load limit. The maximum permissible load can

be found on the vehicle's Tire and Loading Infor-

mation placard on the B-pillar on the driver's side

(/ page 302).

SpecicationsSpecications ffor maximum tiror maximum tire pre pressureessure

The data shown in the illustration is example

data.

Never exceed maximum tire pressure

1 speci-

ed for the tire. Always observe the recommen-

ded tire pressure for your vehicle when adjusting

the tire pressure (/ page 297).

308308

Wheels and tires

InfInforormation on tirmation on tire ce charharactactererisisticstics

The data shown in the image is example data.

This information describes the type of tire cord

and the number of layers in side wall

1 and

under tire tread

TTirire size designation, load-beare size designation, load-bearing capacitying capacity, speed, speed

rrating and load indexating and load index

WARNINGARNING Risk of injury through exceed-

ing the specied tire load-bearing capa-

city or the permissible speed rating

Exceeding the specied tire load rating or the

permissible speed rating may lead to tire dam-

age and to the tires bursting.

Therefore, only use tire types and sizes

approved for your vehicle model.

Observe the tire load rating and speed

rating required for your vehicle.

First letter(s)

Nominal tire width in millimeters

Aspect ratio in %

Tire code

Rim diameter

Load-bearing index

Speed rating

Load index

The data shown in the illustration is example

data.

Information about reading tire data can be

obtained from any qualied specialist workshop.

Wheels and tires

309

FFirsirst let letttter(s)er(s) 11::

Without: passenger vehicle tires according to

European manufacturing standards.

"P": passenger vehicle tires according to US

manufacturing standards.

"LT": light truck tires according to US manu-

facturing standards.

"T": compact emergency spare wheels with

high tire pressure that are only designed for

temporary use in an emergency.

Aspect r

Aspect ratioatio 33::

Ratio between tire height and tire width in percent

(tire height divided by tire width).

Tirire codee code 44 (tir(tire type):e type):

"R" radial tire

"D": bias ply tire

"B": bias belted tires

"ZR": radial tire with a maximum speed above

149 mph (240 km/h) (optional)

Rim diamet

Rim diameterer 55::

The diameter of the bead seat (not the diameter

of the rim ange). The rim diameter is specied in

inches (in).

Load-bear

Load-bearing indeing indexx 66::

Numerical code that species the maximum load-

bearing capacity of a tire (e.g. "91" corresponds

to 1356 lbs (615 kg)).

The load-bearing capacity of the tire must be at

least half the gross axle weight rating of your vehi-

cle. Do not overload the tires by exceeding the

specied load limit.

See also:

Maximum permissible load on the Tire and

Loading Information placard (/ page 302)

Maximum tire load (/ page 308)

Load index

Speed r

Speed ratingating 77::

Species the approved maximum speed of the

tire.

An electronic speed limiter prevents your

vehicle from exceeding a speed of 130 mph

(210 km/h).

Make sure that your tires have the required speed

rating. You can obtain information on the required

speed rating from an authorized Mercedes-Benz

Center.

Summer tir

Summer tireses

IndexIndex Speed rSpeed ratingating

Qup to 100 mph (160 km/h)

Rup to 106 mph (170 km/h)

Sup to 112 mph (180 km/h)

Tup to 118 mph (190 km/h)

Hup to 130 mph (210 km/h)

Vup to 149 mph (240 km/h)

Wup to 168 mph (270 km/h)

Yup to 186 mph (300 km/h)

310310

Wheels and tires

IndexIndex Speed rSpeed ratingating

ZR...Y

up to 186 mph (300 km/h)

ZR...(..Y)

over 186 mph (300 km/h)

over 149 mph (240 km/h)

Specifying the speed rating as the "ZR" index

in tire code

4 is optional for tires up to

186 mph (300 km/h).

If your tire code

4 includes "ZR" and there is

no speed rating

7, nd out what the maxi-

mum speed is from the tire manufacturer.

If load-bearing index

6 and speed rating 7

are in brackets, the maximum speed rating of

your tire is above 186 mph (300 km/h). To

nd out the maximum speed, ask the tire man-

ufacturer.

All-w

All-weateather tirher tires and wintes and winter tirer tireses

IndexIndex Speed rSpeed ratingating

Q M+S

up to 100 mph (160 km/h)

T M+S

up to 118 mph (190 km/h)

H M+S

up to 130 mph (210 km/h)

V M+S

up to 149 mph (240 km/h)

Winter tires bear the i snowake symbol and

fulll the requirements of the Rubber Manufactur-

ers Association (RMA) and the Rubber Association

of Canada (RAC) regarding the tire traction on

snow.

Load inde

Load indexx 88::

No specication given: standard load (SL) tire

"XL" or "Extra Load": extra load tire or rein-

forced tire

"Light Load": light load tire

"C", "D", "E": a load range that depends on the

maximum load that the tire can carry at a cer-

tain pressure

DenitionDenition of tof tererms fms for tiror tires and loadinges and loading

TTirire se strtructuructure and ce and charharactactererisistics:tics: describes the

number of layers or the number of rubber-coated

belts in the tire contact surface and the tire wall.

These are made of steel, nylon, polyester and

other materials.

Bar:

Bar: metric unit for tire pressure. 14.5038 pounds

per square inch (psi) and 100 kilopascal (kPa) is

the equivalent of one bar.

DOT (DeparT (Department of Trtment of Transportansportation):ation): DOT-marked

tires fulll the requirements of the

US Department of Transportation.

Avereragage we weight of teight of the vhe vehicle occupants:ehicle occupants: the

number of vehicle occupants for which the vehicle

is designed, multiplied by 150 lb (68 kg).

UUnifnifororm Tm Tirire Quality Gre Quality Grading Stading Standarandards:ds: a uniform

standard to grade the quality of tires with regard

"ZR" stated in the tire code.

Or "M+Si" for winter tires.

Wheels and tires

311

Wheels and tires -> Tire labeling for Your Mercedes CLA 4 Door Second Generation (2019-2024)

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