I recently did away with my 18" snowflakes and put a set of 20" rims on my fg. I called and arranged to take my car into the dealership to have my speedo recalibrated and when I did they told me that their flash tuner didn't go to 20" so they tuned it to 19". They told me if I had any issues with abs or dsc, that it would be my problem and it could affect my warranty. I was under the impression that you could legally use a 2" larger rim (correct me if I'm wrong) so I assumed ford's flash tuner could accommodate this. I then received a call back from customer service at the dealership asking about my satisfaction with my service, I told them of my concern about my safety and was told I would receive a call back. When the service dept called me back I was told that the rims were illegal because the base model of my 2010 fg xr6t came with 17" rims and even if I had the 18" rim package, I could still only go to a 19" rim (is this true?). I asked if anyone would be able to adjust the ecu to suit the new rims and was told no-one would be able to. Does anyone know if it can be done? and where I stand with warranty? I have no idea when it comes to this sort of stuff so any assistance is appreciated
