All Prius have the Toyota recommended pressure of 35psi front, 33psi rear.JoLaine2 said:Thanks everyone - You've been much more helpful than anyone at my Toyota dealer or the Toyota 800 #! I'm going to recommend they check out this site to keep up to date. My only question is about the tire inflation. I've heard Tom and Ray Magliazzi caution against running higher tire pressure due to safety issues. Would the 40-42 pressure recommended on this list be a safety issue?