Just wondering how much my speedo will be out with 45. I currently have 40 on stock rims. I'm going to have to drive up north BC and since I sold my Yaris only have my Bronco as a second vehicle. Problem is the Bronco would cost me $400+ in gas to get there about 1300KM round trip or $140 in the Fiesta (less if I don't go with 91 gas). There wont be any snow but legally I have to have winter rated tires on that highway and with the Fiesta I'd stand out like a store thumb driving there with the current set up.