I also have 255/70R16s on my F150. Tires have 65K on them and won't last much longer. Thinking of going to 265/70R16s. 70 not 75. These are lighter should provide a better ride. Speedo would be off by 1.2 mph, almost negligable. This is a standard size on Toyotas so there's a good selection. Anyone have any experience with this size on Ford truck? Notice any loss of fuel economy or sluggish feel? Should look a little better on the truck but have never seen this size on an F150. See plenty of 265/75/R16 and they look good but I frequently read complaints about gas usage and dogged out engines, the 4.6L isn't going to blow anyone's doors off let alone with larger tires to push around.