2012 Toyota Prius Owners Manual - Page 786

5-2. Steps to take in an emergency Replacing an aluminum wheel with a steel wheel (including 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 Turn the nut washers until they come into contact with the disc wheel. Disc wheel Washer STEP 3 Lower the vehicle. 466 PRIUS v_U (OM47674U)