All SSR wheels are made to be stronger and lighter, and the center of the wheel where the nut is tightened is designed to be as thin as possible to reduce weight. Therefore, on Professor, EXECUTOR, & REINER series, it is necessary to select a high type or low type center cap to prevent interference in cars where the front and rear hubs on the vehicle side protrude high.
The SSR catalog and the specification table on the website show the clearance values when each cap is attached, so please refer to them and choose the size that suits your car.