Leased a 2016 is350 f sport and wondering if I can put any summer tire on give the car back with that one tire that is different to the stock tires the cars comes with it. I have a winter set up right now. Need one summer tires on the rear 255/35/18

 

Are you referring to one single tire being different than the other 3 tires, or are you asking about putting a different set of tires that are different than what the car came with? To my understanding, the car can come back with any set of tires so long as they match and meet OE spec.