The Women's Tour de France is facing scrutiny following accusations that some riders are using padding in their bras to enhance aerodynamic performance, a practice known as "chest fairing."
Teams have reportedly complained to Dutch cycling outlet WielerFlits, leading tour authorities to increase their inspection of riders' clothing ahead of a stage four time trial. The International Cycling Union (UCI) has previously banned other equipment modifications aimed at aerodynamic advantage, such as internal jersey pockets for nutritional products.
Chest fairing involves inserting padding into bras to alter airflow around the body, thereby reducing drag. This practice is reportedly a concern in both men's and women's cycling. Aerodynamics professor Bert Blocken's 2024 analysis suggested that chest fairing could reduce drag by up to 3.6 percent, potentially saving a rider 16 seconds over a 21-kilometer time trial – a margin that could decide a race.
During time trials, cyclists adopt a tucked position, creating a pocket of air between their helmet, shoulders, and chest. By increasing chest protrusion, riders may aim to redirect air away from this area and lessen pressure on their thighs.
The UCI has issued a notice to teams, stating that the jury will pay close attention to competitor clothing in accordance with article 1.3.032 of UCI regulations, which addresses nonessential elements or accessories that could modify a rider's morphology. The specifics of how this will be enforced non-invasively remain under discussion, with suggestions including checks by female jurors in private tents.
Professor Blocken indicated he has observed photographs that appeared to show objects placed under riders' shirts. This situation draws parallels to a previous cycling controversy involving ski jumpers at the Winter Olympics, where allegations surfaced regarding genital enlargement procedures to improve skinsuit performance. In that case, several Norwegian team staff members received bans, and some athletes faced suspensions, though it was determined the athletes were unaware of the plot.
