Riders' clothing checked at women's Tour over bra padding concerns

The Tour de France Femmes Avec Zwift has implemented clothing checks to prevent riders from gaining aerodynamic advantages. Reports suggest that some athletes may have used bra padding as a form of aerodynamic fairing to improve efficiency, potentially gaining one second per kilometre. Dutch media initially raised concerns about this practice, following which ASO, the race organizer, released a statement. According to the statement, riders must be present for the final checks at least 10 minutes before their start time.

The checks will specifically focus on compliance with UCI regulations, particularly Article 1.3.032, which addresses non-essential elements and clothing items that may alter a rider's morphology. This includes helmets, glasses, shoes, and in-race communication devices. Dutch news outlet Wielerflits stated that this issue has occurred before in women's cycling, even at the Paris 2024 Olympics. Violations could result in disqualification and a fine of nearly £200.

Aerodynamics plays a crucial role in cycling, with the correct shape of the bike frame and skinsuit potentially saving riders several seconds, especially during time trials. However, the challenge lies in enforcing such a rule, as it's difficult to determine how much a woman may need for comfort or functionality. Lidl-Trek's head of technical and innovation, Koen de Kort, acknowledged this difficulty, stating that the biggest issue is determining what is considered essential.

The UCI's rule also prohibits clothing, items, or accessories that are not strictly necessary for functionality. Despite this, the potential aerodynamic benefits remain a significant concern, as demonstrated by a study from Scottish and Dutch universities. Their research found that fairings can significantly reduce drag in wind tunnels, with wider objects yielding the largest gains.