Wheel Arch Height

Park the vehicle on a level surface.
Empty the vehicle so that it is at "curb weight". (Empty the luggage compartment, 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 suspensions 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.

Fig 1: Identifying Wheel Arch Height Measurements

Courtesy of SUBARU OF AMERICA, INC.

WHEEL ARCH HEIGHT SPECIFICATIONS

Wheel arch height specification mm (in) (Tolerance:^{+12 mm}_{-24 mm} (^{+0 47 in}_{-0.94 in} ))
Model	Sedan	Wagon
Model	All models	Except for OUTBACK	OUTBACK
Front	381 (15.0)	381 (15.0)	439 (17.3)
Rear	365 (14.4)	375 (14.8)	438 (17.2)