Mike O'Connor
Riders at the Tour de France Femmes were subjected to additional pre-race equipment inspections ahead of Tuesday’s individual time trial after the UCI moved to crack down on the use of so-called “chest fairing”—padding or other objects worn beneath clothing to improve aerodynamics.
Dutch cycling news outlet WielerFlits first reported on Sunday that several Women’s WorldTeams had lodged complaints with the UCI over the alleged use of padded sports bras to gain an aerodynamic advantage by altering airflow and reducing drag during time trials.
Under UCI regulations, riders are prohibited from using non-essential items or equipment that artificially changes their body shape to gain an aerodynamic advantage.
In a directive issued to teams before the fourth stage, the UCI said officials would pay “particular attention” to ensuring riders complied with regulations covering accessories or items that could alter their physique.
The issue reflects cycling’s increasing focus on marginal aerodynamic gains. Earlier this season, Dutch rider Jan-Willem van Schip was disqualified from a French race after placing a water bottle inside the front of his jersey, with commissaires ruling it provided an unfair aerodynamic benefit.
AG Insurance-Soudal team director Stijn Steels said concerns over chest padding had existed for some time, claiming he first noticed suspicious body-shape changes during the Paris 2024 Olympic Games.
“Last year, many riders filled their bust area with ice or other items to create a larger volume, which gives a better aerodynamic effect,” Steels told Belgian newspaper Het Laatste Nieuws.
“It’s only a few watts, but a few watts matter a lot in a time trial.”
Professor Bert Blocken, an expert in cycling aerodynamics at Heriot-Watt University, said research shows that increasing the roundness of the chest can smooth airflow around the rider and reduce drag.
“We’re talking about a chest fairing that alters airflow around the body,” Blocken said. “Over a 20 to 30-kilometre time trial, it won’t save tens of seconds, but it can provide a gain of several seconds, which can be decisive.”
Several team managers backed the inspections, arguing they were no different from routine equipment or anti-doping checks.
FDJ-Suez manager Stephen Delcourt said his team had no issue with the controls, while former world champion Marianne Vos said it was important that the rules were enforced fairly.
“I don’t think it’s really body searching, so I don’t have a problem with it as long as it’s not too invasive,” Vos said.
However, the inspections have also prompted criticism, with some questioning why similar checks were not carried out before or after the men’s Tour de France time trial.
Others noted that attempts to exploit aerodynamic loopholes have occurred in both the men’s and women’s pelotons, with riders continually searching for small performance gains through equipment and body positioning.
Time trial shakes up the GC
Overnight’s stage 4 individual time trial turned the general classification on its head, with Marlen Reusser producing a superb ride over the 21km course from Gevrey-Chambertin to Dijon. The reigning world time trial champion stopped the clock in 27:30 to take the stage win and pull on the yellow jersey.
Reusser finished just four seconds ahead of Dutch rider Lieke Nooijen, while pre-race favourite Demi Vollering was third, 14 seconds off the pace.
For overnight race leader Sigrid Haugset, it was a much tougher day. Unable to match the specialist time trialists, she dropped more than three minutes to Reusser and slipped to fourth overall.
Tour de France Femmes 2026 – General Classification after Stage 4
| Rank | Rider | Team | Time / Gap |
|---|---|---|---|
| 1 | Marlen Reusser | Movistar Team | 11:47:36 |
| 2 | Demi Vollering | FDJ-SUEZ | +0:14 |
| 3 | Cédrine Kerbaol | EF Education-Oatly | +0:54 |
| 4 | Sigrid Haugset | Uno-X Mobility | +0:56 |
| 5 | Elisa Longo Borghini | UAE Team ADQ | +1:03 |
| 6 | Kasia Niewiadoma | Canyon//SRAM zondacrypto | +1:09 |
| 7 | Paula Blasi | UAE Team ADQ | +1:12 |
| 8 | Anna van der Breggen | SD Worx-Protime | +1:17 |
| 9 | Antonia Niedermaier | Canyon//SRAM zondacrypto | +1:43 |
| 10 | Fenke de Vries | Team Visma | Lease a Bike | +1:47 |
Mike O’Connor – A keen cyclist, runner and photographer, Mike O’Connor is the Editor of Bicycling Australia. He manages the BA website and social media, and loves promoting the achievements of Australian cyclists.
