Subaru WRX & WRX STI Manuals 2017 WRX & WRX STI Owner’s Manual | Page 543

12-8

Specifications/Specifications

& Electrical system
Battery type

55D23L

Alternator

STI

12V-110A

Except STI

12V-130A

STI

Spark plugs

SILFR6A (NGK)
ILKAR8H6 (NGK)

Except STI

& Tires
Tire size

235/45R17 94W

Pressure

245/40R18 97W

17 6 8J

18 6 8 1/2J

Front

33 psi (230 kPa, 2.3 kgf/cm2)

33 psi (230 kPa, 2.3 kgf/cm2)

Rear

32 psi (220 kPa, 2.2 kgf/cm2)

Wheel size

Wheel nut tightening torque

32 psi (220 kPa, 2.2 kgf/cm2)
1

89 lbf·ft (120 N·m, 12 kgf·m)*

*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” F9-4.

& Temporary spare tires
Temporary spare tire size
Temporary spare tire inflation pressure
(recommended cold tire inflation pressure)
Wheel nut tightening torque

T145/70D17

205/50R17
2

60 psi (420 kPa, 4.2 kgf/cm )

33 psi (230 kPa, 2.3 kgf/cm2)

89 lbf·ft (120 N·m, 12 kgf·m)*1 *2

*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.
*2: For the wheel nut tightening procedure, refer to “Changing a flat tire” F9-4.