All the ID.4s have wider rears. FE & Gradient have 255/45R20 on rears and 235/50R20 on fronts. Pro & Pro-S have 255/50R19 on rears and 235/55R19 on fronts. The 20" wheels are 20×8" in the front and 20x9" for the rear. The 19" wheels may be 19×8" all around but are unconfirmed.