Subaru WRX & WRX STI Manuals 2018 WRX & WRX STI Owner’s Manual | Page 528

12-8
Specifications/Specifications
& Electrical system
Battery type
75D23L
Alternator
STI 12V-110A
Except STI 12V-130A
STI
Spark plugs
SILFR6A (NGK)
ILKAR8H6 (NGK)
Except STI
& Tires
Tire size
Wheel size
Pressure
235/45R17 94W 245/40R18 97W 245/35R19 89W
17 6 8J 18 6 8 1/2J 19 6 8 1/2J
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” F9-4.