Over the years I have heard lots of references to frame geometry which cite "angles" such as 73 degrees (apparently that's what Co-Motion design to). Also references to millimeters of rake eg, 55 for Santana and 45 for a Co-Motion with Woundup carbon forks. But . . . what do these figures mean? Can anyone explain in layman's terms how this affects handling and stability of tandems? Perhaps I'm not the only one who would be grateful for an explanation.