Radia l-ply tires must alwa ys be u sed in set s of
four. Under n o cir cumsta nces should t hey be u sed on
the front only. They may be mixed with temporary
spa re tires when necessa ry. A ma xim um speed of 50
MPH is recommen ded while a tem por ary spar e is in
use.
Radia l-ply tires have th e same load-ca rrying capac-
ity a s oth er types of t ires of the same size. Th ey also
use th e same recomm ended in flat ion pressures.
The u se of oversized t ires, eith er in the fron t or
rear of th e vehicle, can cause vehicle drive t rain fail-
ure. This could also ca use inaccu rate wheel speed
signals when t he vehicle is equipped with Anti-Lock
Br a k es.
The use of tir es from different m anufactur es on the
sa me vehicle is NOT recomm ended. The proper tire
pr essu re shou ld be maint ain ed on all four tires.
DESCRIPTION - TIRE PRESSURE FOR HIGH
SPEEDS
Wher e speed limits allow the vehicle to be driven
at high speeds, correct tire inflation pressu re is ver y
import ant . For speeds up to and in cluding 120 km /h
(75 mph), tires mu st be infla ted to the pressures
sh own on the tire placar d. For continuou s speeds in
excess of 120 km/h (75 mph), tires must be infla ted
to the maximum pressure specified on the tire side-
wa ll.
Vehicles loa ded to the maximum ca pa city should
not be dr iven at contin uous speeds a bove 75 mph
(120 km/h).
For emer gency vehicles tha t a re dr iven a t speeds
over 90 mph (144 km/h ), special high speed tires
must be used. Con sult tire m anufa cturer for correct
inflation pressure recomm endat ions.
DESCRIPTION - REPLACEMENT TIRES
The original equipment tir es provide a proper bal-
ance of man y cha racter istics su ch as:
• Ride
• Noise
• Handling
• Du r a bilit y
• Tread life
• Tra ction
• Rolling resistance
• Speed ca pa bility
It is recomm ended that tir es equivalent to the orig-
ina l equipment tires be used when replacemen t is
needed.
Failur e to use equ iva lent replacement tires m ay
adver sely affect th e sa fety an d ha ndling of the vehi-
cle.
The use of over size tires may cause inter ference
with vehicle components. Un der extremes of suspen-
sion a nd steerin g tra vel, interferen ce with v ehicle
components may cause t ire da mage.
WARNING: FAILURE TO EQUIP THE VEHICLE WITH
TIRES HAVING ADEQUATE SPEED CAPABILITY
CAN RESULT IN SUDDEN TIRE FAILURE.
DESCRIPTION - TIRE INFLATION PRESSURES
Under infla tion will ca use rapid sh oulder wear, tire
flexing, and possible tire fa ilure (Fig. 12).
Over inflation will ca use rapid center wear and
loss of t he tire’s abilit y to cush ion shocks (Fig. 13).
Im pr oper inflation can cau se:
• Uneven wear patterns
• Redu ced tread life
• Redu ced fuel economy
• Unsatisfact ory ride
Fig. 12 Under Inflation Wear
1 - THIN TIRE THREAD AREAS
Fig. 13 Over Inflation Wear
1 - THIN TIRE THREAD AREA
22 - 8 TIRES/WHEELS VA
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