I am back, I had the Intimidator III spoiler for sale last year. Anyways my Mom had made it back to a Monte Carlo LTZ 06 Model All black. I knew she would come back from an Impala. Anyways it has the 17" wheels and she has a set of after markert 16's that have new Nascar lettered tires. She wants to put these on in spring time. 225-60-16. I saw that the diameters were only .2 off. That shouldn't be a problem should it as far as speedo goes. Also can you disable the TPMS or what is required to get new wheels set up. She doesnt want to see that light as she did on the 07 Impala. Thanks