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CUSTOMIZING
INSTALLATION
Mounting Procedures
For the proper mounting of Yokohama tires, be sure to observe
some basic precautions:
- Wheel is securely seated on the hub face.
- All lugs have proper torque.
- There is no buildup of dirt between the hub and wheel.
- The wheel is not bent.
- Both tire beads are securely seated on the rim.
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Custom or Alloy Wheels
While custom or alloy wheels require an increased level of care
over steel wheels, it is vitally important that each customer
receives the highest level of service. There are several key points
to note when mounting Yokohama tires. Following these basic
precautions not only yields consistent results, but satisfied
customers - and that translates into return business and new
referrals.
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Avoid scratching or bending alloy wheels
during installation
These wheels are manufactured with extremely soft metals with a
greater sensitivity to scratching and distortion under pressure.
Modern tire machines apply equal pressure to both top and bottom
beads with no pressure on the wheel itself. A pad on the base of
the mounting machine protects chrome-plated, painted or machined
wheels from scratches and damage.
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During the mounting process, proper
lubrication is a must
Lubricate both top and bottom beads with an approved tire
lubricant. If the beads do not seat at 40 psi, break the entire
assembly down and re-lubricate the bead areas.
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Observe match-mounting procedures
Proper tire and wheel assembly balancing is important from a vehicle
safety standpoint. In high-speed driving, improperly balanced tire/wheel
assemblies will cause a vehicle to lose stability and not operate in a safe
and comfortable manner. Improperly balanced tire/wheel assemblies also cause
abnormal treadwear patterns.
To facilitate proper balancing, Yokohama places red and yellow marks on
the sidewalls of its tires to enable the best possible match-mounting of
the tire/wheel assembly. There are two methods of match-mounting Yokohama
tires to wheel assemblies using these red or yellow marks:
- Uniformity (red mark)
- Weight (yellow mark)
Warning: Improper mounting, underinflation, overloading or tire damage may
result in tire failure, which may lead to serious injury. Tire and rim sizes
must correspond for proper fit and application. Never exceed 40 psi to seat
beads.
Warning: Tire changing can be dangerous, and should be done only by trained
persons using proper tools and procedures established by the Rubber
Manufacturers Association. Failure to comply with proper procedures may
result in incorrect positioning of the tire, tube, or wheel assembly,
causing the assembly to burst with explosive force sufficient to cause
serious physical injury or death. Never mount or use damaged tires, tubes,
or wheel assemblies.
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Proper Installation and Spacers
With some custom fitments, it is necessary to use spacers in order to
achieve proper clearances. Whenever the assembly comes into contact
with inner fender members, brake calipers or ball joints, consult the
wheel manufacturer for recommendations on the proper use of
spacers.
Spacers are sometimes necessary when wheels of the proper offset
are not available. However, there are some drawbacks to their
use:
- Spacers are made in various quality grades. Some spacers
may not be able to withstand the forces generated by aggressive
or competitive vehicle use.
- Spacers that use a generic or slotted pattern (for use
on a variety of hub patterns) may make proper location of the
assembly very difficult.
- Spacers may necessitate longer lug bolts.
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Special Considerations for Light Truck Applications
Because light trucks demand special load-capacity considerations,
we've compiled a few rules that should be observed:
Using passenger tires on light trucks
Using passenger car tires on light trucks should be approached with
caution. The varied service that a light truck undergoes means
that the rated load-carrying capacity of a passenger car tire
used on it is reduced. When referencing a passenger car tire for
light truck use, decrease the load specification according to the
following formula:
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This formula results in a reduced load-carrying capacity
equaling approximately 91% of the rated specification of the
passenger tire.
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Dual Tire Applications
- Matching dual tire specifications: Maximum allowable difference
in overall tire diameter between a tire and its dual mate is 1/4".
Maximum difference in circumference is 3/4".
- Spacing: Minimum dual tire spacing is necessary for optimum
performance. Consult tire or vehicle literature for recommendation.
- Using chains: Take care to allow proper clearance between loaded
tires to avoid damage from chains.
Warning: Passenger Tires Mounted on
Light Trucks: Yokohama Tire Corporation's policy provides warranty
coverage for all light trucks, minivans or like designs that had
Yokohama passenger tires installed as original equipment by the
vehicle manufacturer when the Yokohama replacement tire is the
same size, ply and range/load index, and speed rating
(if applicable) of the originally installed tire. The replacement
tire must also have the same classification of tread design, i.e.,
rib, mud snow, all-season, etc., as the original tire. Vehicle
operation must also be limited to personal travel and not
commercial operation of any sort. Vehicle design and/or operation
other than described above will be dutifully denied coverage under
all terms of the Yokohama Standard Limited Warranty for Passenger
Tires.
Warning: To avoid serious hazards, you
must reinflate tires to specified minimum inflation pressure when
used for highway service.
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