U2-28 U2 Wheel Center Cap Serial Number MCD8063YA01 U2 Wheel Replacement Center Cap for model U2-28 OEM Wheel Replacement Center Cap with serial number MCD8063YA01 (see back of cap to match number). **Note: If the numbers do not match the cap, it will not fit your wheel! Back of cap measures 6 3/4" in diameter Chrome plastic Scroll down to Product Description for further fitting help or go to our FAQ on our store site.