I've searched a bit and couldn't find anything definite. There's apparently a "notorious rap band" from France with the name "Secteur A", but I suspect Specialized didn't name the bike after them. Secteur is also apparently French for sector. And Google Maps turned up a few small places with the name Secteur. I ask because the Secteur is on my very short list to buy and would want to be able to answer peoples who ask, "duh, what does secteur mean?"