Recently visited dealer for "free" Prius maintenance clinic. Vehicle OK (at 114,000 miles) except they were concerned about tires. These are indeed wearing out and need to be replaced soon. Dealer states that my tires (Goodyear VIVA 2) are wrong type for this weight car, and that I need to have tires made by Dunlap for this vehicle (and they happened to have Dunlaps in stock for $118 each). I declined offer. My Goodyears are P175/65R-14 81S, which is what the manual recommends. Question is: are the existing tire types OK, or is the dealer correct. I'm inclined to think the dealer is full of crapola.