These "Tron" inspired wheel rings were designed to fit around the brake rotors of your vehicle. The ring illuminates the barrel of the rim with High Grade ORACLE LED Flex Strip. If you are looking for a "head turning" auto mod with just enough sophistication and flair, then these are perfect for you! NOTE: Fits up to 13.5" Rotor. Rotors over 13.5" are considered oversized and will need to add the expanding adapter option. Be sure to check the diameter of your brake rotor to ensure proper fitment. For some cars with very large front rotors we may need to expand the front wheel rings. A fee of $29 will be added (for the 2 front only). Be sure to contact a sales representative for brake size information if needed. NOTE: This item is built-to-order which means there is a processing time of up to 7 business days to have your item built assembled, and shipped. Our ColorSHIFT option requires the use of a ColorSHIFT controller to properly operate.