• It is entirely possible that the more time you spend on a TT bike the better you get at riding one. I think some part of the difference in power output can be down to confidence in handling the bike itself on top of the obvious biomechanical adaptations required. Really deep front wheels and higher hand positions can be hard work on technical courses and crosswinds. Shitty road surfaces are becoming more of a problem now as well making it a case not how much power you can put down in that position but how much power you feel comfortable putting down when things start getting sketchy. My last lot of aero testing was a waste of time for me. It didn't matter as I was helping a mate out with some testing so it was free but I ended up with a position with lower drag that I don't feel safe riding. That might improve a bit with practice but I do need to steer and see so I don't fancy it

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