225/65/17 is common size. (about 2 MPH off)
Also the 235/55/17 (seems more reasonable for this car and about 5 MPH off with a speedo adjustment via PCM)
I really appreciate all the input!!! the folks on here are great!!!
I have a shot of the tire chart from the car....BTW they are 18"s not 17....apparently
she had the "performance package" very handy for 75 year old....also Discount Tire does not appear to carry Michelin....at least in these sizes....they did offer that selection
Lots of retail websites with low cost tires delivered to your door or dealer for install. But, best to stick with one brand/tread design on all 4 tires.
I wouldn't advise going all same size if the manufacturer calls for two different sizes. God forbid there is an accident or worse, it can be argued in court that putting all of the same size on when the manufacturer called for 2 different sizes based on their engineering specs went against the positive handling characteristics the vehicle was designed for, and thus may have caused or contributed to the accident.