I have an 07 gs350 with the spider rims. I also have an 06 is350. my wife needs a suv since we just had another youth. I owe 8k on the gs so its the choice to get rid of since I am now somwhat upside down with the is. I bought some michelin ps2 tires for the gs that only have 500 miles if that. my question is that will those tires size diffrence effect the handling of the is?? If they will I would have to sell those tires to get back stock tires. Oh how it pains me to think of getting rid of my gs350