A guy at my.gym has them, they look nice on his fixie and he honestly looms like the guy in the pic, it.could really be him, im viewing this thread from my Droid with a.cracked.screen and can't quite tell. At any rate his, fixie has 1 brake, 1 chainrings, 1 cog, and a racing seat so even with those heavy wheels, the bike is light. I haven't asked him about their true aero properties.