Step 3
RPermissible load (maximum gross vehicle weight rating from the Tire and Loading Information
placard minus the gross weight of all occupants):
1500 lbs (680 kg)00F8150 lbs (68 kg) = 1350 lbs (612kg )
Vehi cle identification plate
Even if you have calculated th etotal cargo care-
fully, you should still mak esure that th egross
vehicl eweigh trating and th egross axle weigh t
rating are no texceeded. Details can be foun don
th evehicl eidentification plat eon th eB-pillar on
th edriver' sside of th evehicl e (
Ypage 312).
Permissible Gross Vehicle Weight Ratin g
(GVWR): thegross weigh tof th evehicle, all pas-
sengers, load and trailer load/noseweight (if
applicable) must no texcee dth epermissible
gross vehicl eweight.
Gross Axle Weight Ratin g(GAWR): themaxi-
mum permissible load that can be carried by on e
axle (fron tor rear axle).
To ensure that your vehicl edoes no texcee dth e
maximum permissible value s(gross vehicl e
weigh tand maximum gross axle weigh trating),
have your loade dvehicl e(including driver, occu-
pants ,cargo, and full trailer load if applicable)
weighed on asuitable vehicl eweighbridge.
All about wheels and tires
Uniform Tire Quality Grading Stand-
ards
Overview of Tire Quality Grading Stand-
ards
Uniform Tir eQuality Grading Standards are U.S.
governmen tspecifications. Thei rpurpose is to
provide drivers wit huniform reliable information
on tir eperformance data. Tir emanufacturers have to grad
etires usin gthree performance fac -
tors: 0043tread wear grade, 0044traction grad eand
0087 temperature grade. Thes eregulation sdo no t
apply to Canada. Nevertheless, all tires sold in
North Americ aare provide dwit hth ecorre-
spondin gqualit ygrading markings on th eside -
wall of th etire.
Quality grades can be found, wher eapplicable,
on th etir esidewall between tread shoulder and
maximum sectio nwidth.
Example :
RTreadwear grade: 200
RTraction grade: AA
RTemperaturegrade: A
All passenger car tires must conform to th estat-
utory safet yrequirements in addition to these
grades.
iThe actual value sfor tires are vehicle-spe-
cific and may deviat efrom th evalue sin th e
illustration .
Treadwear
The treadwear grad eis acomparative rating
based on th ewear rat eof th etir ewhen tested
under controlled condition son aspecifie dU.S.
governmen tcourse .Fo rexample , atiregraded
15 0would wear on eand one-half times as well
on th egovernmen ttest track as atir egraded
100.
The relativ eperformance of tires depend supon
th eactual condition sof their use, however ,and
may depar tsignificantly from th enorm due to
variation sin driving habits, servic epractices
and differences in road characteristics and cli -
mate.
Traction
GWARNIN G
The traction grad eassigned to this tir eis
based on straight-ahead braking traction
tests, and does no tinclude acceleration ,cor-
nering, hydroplaning ,or peak traction char-
acteristics.
All about wheels and tires315
Wheels and tires
Z
