{
  "id": 5415938,
  "title": "Can a padded bra make you faster? New CFD modelling delivers a deflating answer for cyclists",
  "url": "https://urgent.news/2026/09/03/can-a-padded-bra-make-you-faster-new-cfd-modelling-delivers-a",
  "topic": "culture",
  "section": "Culture",
  "published": "2026-09-03T20:58:06.000Z",
  "source": {
    "name": "Cycling Weekly",
    "slug": "cycling-weekly",
    "url": "https://www.cyclingweekly.com/news/can-a-padded-bra-make-you-faster-new-cfd-modelling-delivers-a-deflating-answer-for-cyclists"
  },
  "original_language": "en",
  "account": "Recent CFD modelling has ruled out the possibility of padded bras providing cyclists with an aerodynamic advantage. Ahead of a recent Tour de France stage, officials began examining cyclists' chests for potential padding to create a chest fairing, a design intended to reduce drag during time trials. However, the UCI regulations prohibit any clothing or accessories that modify a rider's morphology or improve aerodynamics, making it unclear how much padding could be permitted. While initial chest fairing studies suggested drag reductions of up to 3.6%, AiRO's new modelling indicates that the effect of sports-bra-sized padding is negligible. A push-up bra is more likely to lift a rider's expectations than their speed. AiRO's tests involved a female rider model wearing a Specialized Evade helmet, with three chest volumes tested: small, medium, and large. The results showed negligible differences in drag among the chest configurations, with the Specialized Evade helmet indicating a 2.2% reduction in speed across all chest sizes. Even a \"proper fairing\" had minimal impact, with only a −0.7% reduction in drag on the Giro Aerohead and −0.1% on the Specialized Evade. While the findings suggest that padded bras do not provide a measurable speed advantage, the limitations of the study, including its use of a single rider model and parametric human model, mean that the results may not be universally applicable.",
  "summary": "AiRO's modelling puts the Tour de France Femmes controversy to the test",
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}