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 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 Fig 1 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

Wheel arch height specification mm (in) (tolerance: ^{+12 mm}_{-24 mm} (^{+0.47 in}_{-0.94 in} ))
Model	Impreza model	Crosstrek model
Tire size	P195/65R15 P205/55R16 P205/50R17	P225/55R17 225/55R17
Front	387 (15.24)	452 (17.8)
Rear	368 (14.49)	450 (17.72)