> Or is that just used because a traditional frame is optimal for weight rather than aerodynamics? It's exactly this tradeoff. Time trial bikes are generally

> Or is that just used because a traditional frame is optimal for weight rather than aerodynamics? It's exactly this tradeoff. Time trial bikes are generally optimized for aerodynamic efficiency since there generally isn't a lot of climbing they do. Climbing bikes are generally optimized for weight - typically with more basic looking tubes. And for many sections, riders pick a hybrid bicycle with some aero features, but also with an emphasis on light weight.