I've just been looking at danscomp.com, and have found something interesting. Primo's Powerbites, as well as their Hollowbites aren't any lighter than Profile Racing cranks or Odyssey 41 Thermal cranks. So why make them out of aluminum if they aren't any lighter? Isn't that the reason to make stuff out of aluminum? It doesn't make sense. I just thought that was odd, that's all.