Subaru WRX 2018, Owner'S Manual, Page: 528 / 572

Specifications/Specifications
&
Electrical system
Battery type 75D23L
Alternator
STI 12V-110A
Except STI 12V-130A
Spark plugs
STI SILFR6A (NGK)
Except STI ILKAR8H6 (NGK)
&
Tires
Tire size 235/45R17 94W 245/40R18 97W 245/35R19 89W
Wheel size
17
6
8J 18
6
8 1/2J 19
6
8 1/2J
Pressure Front
33 psi (230 kPa, 2.3 kgf/cm
2
)
Rear
32 psi (220 kPa, 2.2 kgf/cm
2
)
Wheel nut tightening torque
89 lbf·ft (120 N·m, 12 kgf·m)*
1
*1: This torque is equivalent to applying approximately 88 to 110 lbf (40 to 50 kgf) at the end of the wheel nut wrench. If you have tightened the wheel
nuts by yourself, have the tightening torque checked at the nearest automotive service facility as soon as possible. For the wheel nut tightening
procedure, refer to
“
Changing a flat tire
” F
9-4.
12-8