Out of all those listed, this one is actually less restrictive that what it replaced, which was a (somewhat poorly defined) requirement for the forearm to be horizontal. In aero testing we've been able to legally set people up with a partial mantis that would not have been permitted after the 2007 rule change.D-Queued said:Height difference between arm rests and highest and lowest point of the extension limited to 10 cm. This is a further restriction of the ‘praying mantis’ position
Also they removed morphological checks this year and now automatically permit riders to have one or the other of bring saddle forward to the vertical line of the centre of BB or an extra 5cm extension of bars, but not both. Previously this option was not automatic (especially the saddle) and you were very much at the whim of the commissaire on the day.