2013 Lexus GS 450h Owners Manual - Page 729

7-2. Steps to take in an emergency 757 Installing the spare tire 1 Remove any dirt or foreign matter 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. 2 Install the spare tire and loosely tighten each wheel nut by hand by approximately 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. Tapered portion Disc wheel seat When replacing an aluminum wheel with an aluminum wheel, turn the wheel nuts until the washers come into contact with the disc wheel. Disc wheel 7 When trouble arises Washer GS450h_U (OM30D01U)