Wheel Arch Height

Park the vehicle on a level surface.
Empty the vehicle so that it is at "curb weight".
NOTE: Empty the trunk or luggage room, load the spare tire, jack and service tools, and fill up the fuel tank.
Set the steering wheel in a straight-ahead position, and stabilize the suspension by moving the vehicle in a straight line for 5 m (16 ft) or more.
Suspend a thread from the wheel arch (point "A" in the figure below) and affix at a position directly above the center of wheel.

Measure the distance between the point "A" and the center of wheel.

Courtesy of SUBARU OF AMERICA, INC.

Model	Tire size	Wheel arch height specification mm (in) (Tolerance: ^{+12 mm}_{-24 mm} (^{+0.47 in}_{-0.94 in} ))
Model	Tire size	Front	Rear
Sedan model	225/55R17 225/50R18	397 (15.63)	383 (15.08)
OUTBACK model	225/65R17 225/60R18	468 (18.43)