Another weird aspect of the presentation is that the authors imply that differences in rider performance (if they were to exist) would be the result of differences in transmitted vibration through the frame. In fact both vibration transmission and differences in rider performance would be two dependent variables that might be correlated, but without any hint of a cause-effect relationship. There are many other dependent variables that could be measured with regard to the three frame materials. At this point who could know which of these would be the cause of performance differences. Frankly, as a scientist, this study is embarrassing to me. How could folks with such credentials get things so wrong.