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Cycling Weekly
Cycling Weekly
Sport
Andy Turner

Helmet choice is pivotal to time trial aerodynamics – I'm an aero consultant, and this is why and how to get it right

Pauline Ferrand Prevot during TT.

Pauline Ferrand-Prévot suffered a major setback to her Tour de France Femmes avec Zwift title defence yesterday in a time trial that saw her lose over two minutes to Marlen Reusser, and the difference between the two riders could not have been starker. Whereas Reusser had a position on the bike that looked sleek with every component of the bike, her kit, and helmet dialled in to produce a bullet-like shape, Ferrand-Prévot looked a very different rider altogether.

The most prevalent aspect of her setup that just didn’t look right was the large Giro Aerohead II helmet that she was wearing. It was wider than her shoulders, and her position on the bike meant that it stuck out above her back when looking at her from the camera motorbike behind’s view.

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