Load index 88:
R
"Light load": light load tires
R
"C": commercial tires
Information on definitions (tires and load‐
ing)
Tire structure and characteristics: describes
thenumber of layers or thenumber of rubber-
coated layers in thetiretread and thetirewall.
These aremade of steel, nylon, polyester and
other materials.
Bar: metric unit fortirepressure.
14.5038 pounds per squareinch(psi) and
100kilopascals (kPa) arethe equivalent of 1bar.
DOT(Department of Transportation): DOT
markedtires fulfill therequirements of the
U.S. Department of Transportation.
Averageweight of vehicleoccupants: the
number of occupants forwhichthe vehicle is
designed multiplied by 150lbs (68 kg).
UniformTireQuality Grading Standards: auni‐
form standardtograde thequality of tires with
regardstotread quality,tiretraction and temper‐
aturecharacteristics. The quality grading assess‐
mentismade by themanufacturer in accordance
withtestspecifications of theU.S. government.
The quality grade of atireisimprinted on the
sidewall of thetire.
Recommended tirepressure: therecommen‐
ded tirepressureisthe pressurespecified forthe
tires installed on thevehicle at thefactory.
The Tire and LoadingInformationplacardcon‐
tains therecommended tirepressures forcold
tires, themaximum permissible load and the
maximumpermissible vehicle speed.
The tirepressuretable contains therecommen‐
ded tirepressures forcold tires under various
operating conditions, i.e. load and/or speed of
thevehicle.
Increased vehicleweight due to optional
equipment: thecombined weight of all standard
and optional equipmentavailable forthe vehicle,
regardless of whether it is actuallyinstalled on
thevehicle or not.
Rim: thepartofthe wheel on whichthe tireis
installed.
GAWR (Gross AxleWeight Rating): GAWR is the
gross axle weight rating.The actual load on an
axlemustnever exceed theGross Axle Weight
Rating.You can find theGross Axle Weight Rating
on theB-pillar on thedriver's side.
Speed rating: thespeed rating is part of thetire
identification.Itspecifies thespeed rangefor
whichatireisapproved.
GVW(Gross VehicleWeight): theGross Vehicle
Weight includes theweight of thevehicle includ‐
ing fuel, tools, thesparewheel, accessories
installed, occupants, luggageand thetrailer
drawbar noseweight if applicable. The Gross Vehi‐
cle Weight mustnever exceed theGross Vehicle
Weight Rating (GVWR)specifiedonthe B-pillar on
thedriver's side.
GVWR (Gross VehicleWeight Rating): the
GVWR is themaximum permitted gross weight of
thefully laden vehicle (weight of thevehicle
including all accessories, occupants, fuel, lug‐
gage and thetrailer drawbar noseweight if appli‐
cable). The Gross Vehicle Weight Rating is speci‐
fied on thevehicle identification plateonthe B-
pillar on thedriver's side.
Maximum weight of theladen vehicle: the
maximumweight is thesum of thevehicle's curb
weight,weight of theaccessories, maximum load
and theweight of thefactoryinstalled optional
equipment.
Kilopascal (kPa): metric unit fortirepressure.
6.9 kPaare theequivalent of 1psi. Another unit
fortirepressure is bar.100 kilopascals (kPa) are
theequivalent of 1bar.
Load index: in addition to theload-bearing index,
theload indexmay also be imprinted on theside‐
wall of thetire. This specifies theload-bearing
capacity moreprecisely.
Curbweight: theweight of avehicle withstand‐
ardequipmentincludingthe maximum capacity
of fuel, oil and coolant. It also includes theair-
conditioning system and optional equipment if
these areinstalled on thevehicle, but does not
include passengersorluggage.
Maximum tireload: themaximum tireload is
themaximum permissible weight in kilograms or
lbs forwhichatireisapproved.
Maximum permissible tirepressure: maximum
permissible tirepressurefor one tire.
Maximum load on one tire: maximum load on
one tire. This is calculated by dividing themaxi‐
mum axle load forone axle by two.
PSI (pounds per squareinch): standardunit of
measurementfor tirepressure.
Wheels and tires
227
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