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Wheel Alignment: Inspection: Caster

  1. Place the front tire on the turning radius gauge. Make sure the ground contact surfaces of the front and rear tires are at the same height.
  2. Set the adapter into the center of wheel, and then set the wheel alignment gauge.
    G13642462Courtesy of SUBARU OF AMERICA, INC.
  3. Measure the caster angle in accordance with the operation manual for wheel alignment gauge.
Model Tire size Caster
WRX model 235/45R17 6°30'
245/40R18 6°33'
STI model 245/40R18
245/35R19
245/35ZR19
6°33'