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Maintenance & Care

Mounting Your Tires

Some basic precautions should be observed when mounting your Yokohama tires. Always make sure to:
  • Securely seat the wheel to the hub face.
  • Properly torque all lugs.
  • Remove any buildup of dirt between the hub and wheel.
  • Check for bends or cracks in the wheel.
  • Securely seat both tire beads on the rim.
  • Avoid scratching or bending alloy wheels during installation.
Proper balancing begins with proper mounting. 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.

Mounting Your Tires

Uniformity Method (Red Mark)


When performing uniformity match-mounting, the red mark on the tire, indicating the point of maximum radial force variation, should be aligned with the wheel assembly's point of minimum radial run-out, which is generally indicated by a colored dot or a notch somewhere on the wheel assembly (consult manufacturer for details). Radial force variation is the fluctuation in the force that appears in the rotating axis of a tire when a specific load is applied and the tire rotated at a specific speed. It is necessary to minimize radial force variation to ensure trouble-free installation and operation. Not all wheel assemblies indicate the point of minimum radial run-out, rendering uniformity match-mounting sometimes impossible. If the point of minimum radial run-out is not indicated on a wheel assembly, the weight method of match-mounting should be used.

Weight Method (Yellow Mark)


When performing weight match-mounting, the yellow mark on the tire, indicating the point of lightest weight, should be aligned with the valve stem on the wheel assembly, which represents the heaviest weight point of the wheel assembly. After match-mounting by either of the above methods, the tire/wheel assembly can be balanced.

(Warnings/Disclaimers ):

Never use air tools to install high-performance wheels. Always use a torque wrench and follow accepted tightening procedures.

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.

Tire changing can be dangerous and should be done only by trained persons using proper tools and procedures established by the US Tire Manufacturers Association (USTMA). 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.