RetroSBK, Inc. is an American company located in Camarillo, California. RetroSBK designs and builds custom and retro-inspired motorcycles. Most notably, RetroSBK-designed motorcycles are featured in the movie Transformers: Revenge of the Fallen as the three components of Arcee. RetroSBK closed in December 2011. Its founder went on to start Motorcycle Service Centers and WKKustoms.