That’s interesting. Looks like the aero advantage is from the yawed airflow striking the drive side first.

The article also mentions more weight on the inboard side, which I would call a marginal marginal gain. Perhaps a micro-gain!

Only the Japanese team bike had a left-side drivetrain at the 2024 Olympics, which suggests that any advantage is very small. Otherwise they would all be doing it as standard.

https://www.bikeradar.com/news/paris...ope-lotus-bike