Lexus 2013 IS250 Owner's Manual page 518

Installing the spare tire
1
Remove any dirt or foreign mat-
ter from the wheel contact sur-
face.
If foreign matter is on the wheel con-
tact surface, the wheel nuts may
loosen while the vehicle is in
motion, causing the tire to come off.
2
Install the tire and loosely tighten each wheel nut by hand by approxi-
mately the same amount.
When replacing an aluminum
wheel with a steel wheel, tighten
the wheel nuts until the tapered
portion comes into loose contact
with the disc wheel seat.
3
Lower the vehicle.
4
Firmly tighten each wheel nut
two or three times in the order
shown in the illustration.
Tightening torque:
103 N•m (10.5 kgf•m, 76 ft•lbf)
5
Stow the flat tire, tire jack and all tools.
IS250_EE(OM53B11E)
8-2. Steps to take in an emergency
503
Tapered por-
Disc
wheel
8