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

The Tour de France Femmes Avec Zwift is enforcing clothing checks to prevent riders from using bra padding as an aerodynamic advantage. Dutch media have reported concerns that some female cyclists may have used padding in their bras to gain a slight speed edge, potentially adding one second per kilometre. Race organiser ASO confirmed the issue following media reports and outlined the strict checks riders must undergo before the race.

These checks will occur within 10 minutes of their start time and will focus on compliance with UCI regulations, which prohibit any non-essential elements that could alter a rider's morphology. Such modifications could result in disqualification and a fine of nearly £200. The concern arises from the importance of aerodynamics in cycling, where a well-aerodynamic bike frame and skinsuit can save riders precious seconds, particularly during time trials.

Previous instances of similar practices in women's cycling, including at the Paris 2024 Olympics, have been documented. The UCI's rule prohibits any clothing or accessory not strictly necessary for functionality. However, enforcing these rules is challenging due to the grey area in determining what is truly necessary for a rider.

Lidl-Trek's technical innovation head, Koen de Kort, highlighted the difficulty in policing this aspect of the sport, acknowledging the grey area in deciding what is permissible. A study by researchers at universities in Scotland and the Netherlands found that fairings on a mannequin of a male rider, measuring 177cm tall, could significantly reduce drag in a wind tunnel, demonstrating the potential aerodynamic benefits that could be gained through such modifications.