Run flat tires can cost 20% when compared to LRR tires. JeffD #9 jdenenberg, May 4, 2024 bisco cookie crumbler Joined: May 11, 2005 110,886 50,433 0 Location: boston Vehicle: 2012 Prius Plug-in Model: Plug-in Base how is 66mpg to 46mpg 20%? #10 bisco, May 4...