The new X1 can run 17"-20" wheels, and prob larger with a few mods or custom tires, but 17-20 can fit with the proper tire size. Optimal width would be from 7"-8.5" wide. Offset can be anywhere from ET35-50 dependent on the width. If you'd like for us to check fitment on a specific wheel, please pm us.
Sales @ UPWheels.com *
Ph. 657.888.4UPW * FacebookDOTcom/UPWheels