2010 F150 XLT
I have a F 150 XLT super crew with factory 17" tires. Thinking about putting on 18"
rims and tires. Does anyone know of concerns or any thing I need to do as far as
speedometer or pressure monitor calibrations. Rear end is 3.55
it wont through the speedo off but about 5 mph,if running 60 by speedo you running 65.no problem going to 18,s
As long as the tires are close the the size (messurment wise) then your spedo wont be off tobad, just like PAPA said. but if you go with bigger tires, for expample, I went from the stock 30.5" to 35" with 18' rims. my spedo was off by 6mph at 60 and 8mph at 70. faster... I bought a edge programer and just pluged it into the OBD2 port under thand dash and put my numbers in to flash the computer. It saves the stock tune onto the programer so that way if i ever go back to stock then I can just plug it back and retune to stock.. Hope this helps
Search Ford F-150 Questions
Ford F-150 Experts