well they don't have a cog/lockring interface so, no, they aren't ideal for fixed gear. They have an interface that is used for multi speed sprockets. I think you can buy a converter to convert those types of hubs into FG hubs, but it will cost like 80 bucks. Someone who knows more about this will surely come to the rescue, but for the momeny I am giong to say that wheelset is definitely not ideal for FG use.