2012 Toyota Prius Owners Manual - Page 829

5-2. Steps to take in an emergency Replacing an aluminum wheel with a compact spare tire Tapered portion Tighten the nuts until the tapered portion comes into loose contact with the disc wheel seat. Disc wheel seat Replacing an aluminum wheel with an aluminum wheel Disc wheel Turn the nut washers until they come into contact with the disc wheel. Washer 5 When trouble arises 529