Lexus IS250 U Owner's Manual page 493

Installing the spare tire
Remove any dirt or foreign matter
1
from the wheel contact surface.
If foreign matter is on the wheel contact
surface, the wheel nuts may loosen
while the vehicle is in motion, causing
the tire to come off.
Install the spare tire and loosely tighten each wheel nut by hand by approxi-
2
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.
Lower the vehicle.
3
Firmly tighten each wheel nut two or
4
three times in the order shown in the
illustration.
Tightening torque:
76 ft•lbf (103 N•m, 10.5 kgf•m)
Stow the flat tire, tire jack and all tools.
5
IS350/250_U (OM53C50U)
8-2. Steps to take in an emergency
493
Tapered portion
Disc wheel
seat
8