AeroX: from pain point to breakthrough

How AeroX began

It started with long hours on a smart trainer. Power up, numbers up… then race day: climbing, I caught riders; on the flat, I got dropped. The reason? Aerodynamics — the invisible drag that’s ~70 % of resistance at 25 km/h and up to 95 % at high speed.

Like many, I thought higher Zwift watts meant real progress. I wasn’t training my aero position. Outside, I held it for minutes at best. I blamed bikes and wheels… until my CNRS background reminded me: ~80 % of aero losses come from the rider, not the gear. The real brake was me.

Feel can fool you. Pushing harder isn’t the answer. A raised head or wide aerobars can cost dozens of watts and several km/h. Indoors, nothing forces you to learn or correct your posture. Worse, Zwift tucks your avatar downhill when you stop pedaling — misleading. Result: zero feedback. Zero constraints. Zero lasting progress.

Out of that frustration came AeroX: an app that turns your smart trainer into a virtual wind tunnel. With just a webcam, you see in real time how position changes affect speed. You save watts and go faster — like a pro wind tunnel at €1800/day — but from your living room, for the price of a coffee a day.

From the first tests, it was clear: narrower aerobars, head tucked, position held — I gained 3 km/h in races. Beyond a personal tool, AeroX lets thousands of cyclists and triathletes learn aero, measure it, feel it, and finally train smart so every watt turns into speed.